techknow...we're heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >> >>> israeli helicopters are on the attack as the defensive in gaza goes on. >>> neighbourhoods near the israeli border are under huge bombardments. thousands are fleeing their homes in the desperate safe for anywhere safe. >>> you're watching al jazeera, live from doha. also ahead - where have the bodies been taken. pro-russian gunmen accused of farmering with evidence at the scene of a shot down m

techknow...we're heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america > pass >>> this is al jazeera america. i'm thomas drayton in new york. let's get you caught up on the top stories at this hour. fire in the night sky over gaza as israel's ground offensive enters its fourth day. >> i have seen so much, so many screams, so many devastated families. >> a doctor in gaza sends out a passionate plea to president obama. >> we observed for the first time today bodies being removed and packed into body ba

techknow...we're heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >> israeli air strikes in gaza, push the palestinian death toll to nearly 850. ♪ >>> as the death toll rises pressure of a diplomatic solution grows, but in the last hour, israel rejected a ceasefire proposal. you are watching the al jazeera news hour, live from london. also coming up. displaced by fighting nearly a quarter of a million people have been forced from their homes in ukraine. thousands protest in egypt

techknow...ry saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >>> this is al jazeera america. i'm thomas drayton in new york. let's get you caught up on the top stories of this hour. international monitors in ukraine struggle to get unrestricted access to the crash site of malaysia airlines mh17. ban ki-moon heads to qatar to try to broker a ceasefire with the palestinian president. activists take to the

al jazeera america. [ ♪ music ] >>> hey, etch, welcome back to techknow.il torres, with marr itema and costa. you and i had the opportunity to get up and personal with a creature that most people don't want to be up close and personnel with - sharks. both of us walked away from the experience with a love for the beasts. that's one of the reasons why this next story just off the coast of california is some good news. . >> reporter: return of the great white shark. no, it's not a b movie title, no conservationist can take credit for the script allowing it to happen. according to an international study led by the florida programme for shark research, the white shark population off the coast of california is much health year than previously thought. reachers statement more than 2,000 whites call the waters off the golden state home. a previous study conducted by stanford university in 2011 estimated 300 or so white sharks were in the same area. as for the why? the buffet line re opened. scientist involved in the study credit the resurgent to decades of state a

download it now >>> welcome back to techknow. phil torres, joined by cara santa maria, marita davison, and dr shini somara. now, shini has been taking us on a journey through greenland. we have seen the flights and the science. what was it like to be there with the scientists? >> well, i got to experience that first hand. we were staying in the statement location as where the n.a.s.a. crew live. it was pretty amazing, to say the last. really cold. let's take a look. >>> i came to greenland to join n.a.s.a.'s operation icebridge. their goal is to collect the critical data on how polar ice sheets are changing. here the an arctic they days are long at this time of year. you have to stay up until nearly midnight to catch the famous northern lights. to the n.a.s.a. scientists home kiss. >> just taken off my boots. they are so heavy, it's a relief to take them off. i'm keeping them outside my room, because it's a custom. i noticed that my room used to be a storage room, so welcome to my humble dwelling. i told you it was basis. these a

"techknow" is next. you can go to our website aljazeera.com. >>> meet troy, the dog who may have saved his master's life >> numbers ling up against me zzling up against me. researchers put them to the test under laboratory conditions. >> dogs can identify any kind of cancer sample? >> dr. shini somara, a mechanical engineer. tonight, can doctors save lives by bringing them into suspended ant i medication? dr. dilworth, a molecular scientist and i am phil torres. i am an entomologist. >> that's our team. let's do some noedz /* [ music ] >> guys, welcome to "techknow." joining me are car a santa maria, shini somara and krista dilworth. i am excited for today's episode because it involves one of the best animals out there, man's best friend, the dog. and cara, you got to play with a bunch of dogs. we know dogs make us happy but they can also potentially make ? >> yeah. so there is evidence to show that dogs can actually detect cancer. and i got to visit the laboratory, some training facilities and even meet

that's the team, let's do some science. ♪ music ] >>> hey guys, welcome to "techknow."hat does the bulletproof vest have to do with goat's milk. the answer lies in spider silk - of all things. i got a chance to look at the future of fabrics. it is fascinating. let's take a look. >> reporter: they are nature's masterful architects, genius at structural design. their silk - though just a fraction of the size of a human hair, is stronger than steel and more powerful than tevlar. you have called spider silk the ancient biomaterial for the future. what do you mean by that? >> spiders have been around for roughly 600 billion years. it has properties that no manmade properties have. >> what can you use it for? >> medical products, car tyres, bike tyres - looking at it for air bags. >> how do you get from a single strand of spider silk to a group. a good place to start at at the spider lab at the university of california in cheryl hayashi's lab. >> we are historians of the spider geno. we are trying to figure out the blueprints for making the silk. you have a transformation fro

>> announcer: this is techknow, a show about innovations that can change lives. this is a show about science by scientists. let's check out the team. dr shini somara is a mechanical engineer. onight "techknow" on the road in greenland. >> we are on our way to the air base. i'm nervous. >> we are on board for n.a.s.a.'s operation icebridge - flying over some of the largest ice sheets on the planet. >> i managed to get into the cockpit, which, for a mechanical engineer, is a dream come true. >> of the the view is amazing, but something a wrong. >> this gigantic, ancient ice sheet is melting. >> we explore what is happening in greenland and how soon it will effect us. >> marita davison socializes in evolution, cara santa maria is a scientist journalist and educato in microbiology, and i'm phil torres, i'm an ento meteorologists. that's the team, let's -- entomologist. that's the team - now let's do some science. 7 music ♪ ] >>> hey, whim to "techknow." i'm phil torres, joined by shini somara, marita davison, and cara santa maria. we are in for a treat. shini - you j

that's our team, now let's do some science. >>> hey, guys, welcome to "techknow." i'm phil torres jind by marita davison and costa. you designed bionic eyes yourself. and this story you got to look there. >> you talk about changing the world and huge innovation in science and technology, talking about restoring vision for the blind. this new technology approved by the f.d.a. - weigh saw it installed in a patient. it's amazing stuff. let's check it out. [ ♪ music ] . >> reporter: in a few minutes lisa will undergo an innovative surgery procedure, taking her from darkness to eventually seeing shapes outlines and images. >> and we are literally hours right? >> yes. >> reporter: how long have you been waiting? >> a year and a half since i heard about it and trying to get though the process, approvals. i can't believe it's here. >> reporter: lisa has rhettinal pigmentosa, a degenerative disease. sight loss can be severe to complete blindness. >> i see shadows, and sometimes silo wets, depending on the light in the room. it's gradual, since my mid 20s. probably in the le

>>> this is techknow. a show about innovations that can change lives. we're going to explore the intersection of hardware and humanity and we are doing it in a unique way. this is a show about science by scientists. let's check out the team of hard core nerves. costa is an engineer designing bionic eyes to space satellites. we are in the oi for a life-changing moments. >> we are hours away. how long have you been waiting for surgery? >> lisa has not been able to see for decades. she's about to be fitted with amazing technology. will it work. a real-life drama. >> you tell us when and if you see anything. >> i'm seeing flashes. marita davison is a biologist specialising in ecology and revolution. tonight it may look like i'll yeps, but this is real. >> this adult is basically carcass. >> insects cattle it out and the health of california's orange crop is at stake. i'm phil torres. i'm an entomologist. tonight the great white shark makes a comeback. that's our team, now let's do some science. >>> hey, guys, welcome to "techknow." i'm phil torres jind by m

"techknow" is next. head to al jazeera.com for updates. >> this is "techknow." a show about innovations that can change lives. we're going to explore the intersection of hardware and humanity and doing it in a unique way. this is a show about science by scientists. let's check out our team of hard core nerds. >> dr. crystal dilworth is a neuroscientist specializing in nicotine research. tonight, e-cigarettes. why they're so addicting to kids and what's really in those fruity flavors. >> breathing particles cause people to die of heart attacks, plain and simple. >> i'm phil torres, an entomologist. tonight i meet the indiana jones of space technology, and discover -- >> we're the same people who. >> kosta grammatis. and lindsay moran. a former cia agent. that's our team. now let's do some science. ♪ >> hey guys, i'm phil torres. welcome to "techknow" i'm joined by are crystal dilworth, and kosta grammatis. and linda moran. - lindsay moran. >> let's take a look at the safety of e-cigarettes in general. >>> they're fruity flavorful fun and more popular than ever. t

and go behind the scenes at aljazeera.com/techknow. on >> on tech know, >> what if there was a miracle? >> grace's stem cells are in this box. >> that could save the live of your child... >> we're gonna do whatever we can >> would yo give it a try? >> cell therapy is gonna be the next big advance in medicine >> tech know, every saturday go where science meets humanity. >> this is some of the best driving i've every done, even though i can't see. >> tech know. >> we're here in the vortex. only on al jazeera america. >> announcer: this is al jazeera. ♪ >>> welcome to the news hour, i'm in doha these are our main global news stories. >> the deaths are an outrage of unspeakable proportions. >> the u.s. condemns the shooting of a malaysian airliner in ukraine, and suggests pro-russian separatists are responsible. international investigators have arrived at the crash site but say they are being denied proper access. more than

. >>> this is "techknow," a show about invasions that can change lives. we are going to explore the intersection of hardware and humanity and we are doing it in a unique way. this is a show about science by scientists. let's check out our team of hardcore nerds. dr. shim soma are. a, tonight, ojbriganse motivates with his voice. get ready for something great. stay humble and hungry. imagine if he still had his real voice. next, the technology that's allowing patients to save a valuable part of themselves. >> that's significant. >> before it's too late. lindsey moran is a former cia operative and analyst. tonight, from searching the galaxies for et to searching the rubble for human life, this is the space-aged machine that can detect a heart beat through tons of concrete. rachelle olmixon is a neuro scientist. tonight, the mystery in the waters of america's northwest. scientists try to figure out what's killing the oysters before it's too late. i am phil torres, an entomologist. that's our team. let's do some science. >>> welcome to tech know. i am phil to

techknow...> we're heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america ♪ >> welcome back. we're talking about average joe entrepreneurship, people renting out their idle assets to earn a little extra cash. it has turned to a $26 billion a year industry. that is not chump change. is the shared economy infringing on revenue streams or creating knew ones. >> people like avis and hertz they go out and acquire the companies that came into this car-sharing business early on. and companies are taking risks they wouldn't have normally taken. i think you can see companies like air b&b, and uber, they will be competing wit

techknow... >> we're heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america al jazeera america. we understand that every news story begins and ends with people. >> the efforts are focused on rescuing stranded residents. >> we pursue that story beyond the headline, pass the spokesperson, to the streets. >> thousands of riot police deployed across the capital. >> we put all of our global resources behind every story. >> it is a scene of utter devastation. >> and follow it no matter where it leads - all the way to you. al jazeera america, take a new look at news. >> al jazeera america starts off at 8 with primetime new

. ♪ ♪ are hey guys welcome to "techknow". i'm phil torres and here with kosta and shini.e in the u.s. when you think about tornado alley, you think of oklahoma. you recently went there. >> very high frequency of tornadoes, 50 on average. we went to moore, oklahoma, it was devastated by tornadoes on may 20th. we went to university technologists, let's take a look. >> west side of burton we have a major tornado coming down. >> may 20th, 2013, one of the worst tornadoes on record is captured on a time lapse video that went viral. >> people in west moore must be underground for this tornado. we have large large chunks of debris. >> the entire nation watched, as the tornado took a direct hit on the hig elementary. in moore. >> from the looks of the school i knew it wasn't looking good. >> winged recorded at over -- winds recorded at over 210 miles per hour. turning the ground into a pile of rubble. >> it needs to be a priority. you need to have a shelter. >> 300 miles from moore in texas tech university lab, they work to make it a reality. >> what we have here is an air cannon

welcome to "techknow" i'm joined by are crystal dilworth, and kosta grammatis.nd linda moran. - lindsay moran. >> let's take a look at the safety of e-cigarettes in general. >>> they're fruity flavorful fun and more popular than ever. the explosion in advertising dollars and sales of strong cigarettes are in the billions as the devices are being touted as a safer alternative to smoking tobacco cigarettes. >> i think it's the best thing smoke. >> i wake up in the morning and my lurchtion hurt really bad. i started vaping and it started getting better and better. >> are the claims really true or are they a smoke screen? the health rirvetion associated with the use of electronic cigarettes associate with the liquids themselves. the research at u.c. riverside, indicates that we shouldn't be just concerned about the are liquids but the devices themselves. >> when you do your experiments in the lab you hope to find something and it all started with one cardomizer. we found burning on the fibers. we kept dissecting and dissecting and found this over and over again. i n

news... ♪ ♪ >> hey guys, welcome back to "techknow". we are talking tornadoes.you are not only got to see how they predicted them better but you literally jumped in. >> i did. we were in the vortec where i got to experience ef 3 winds. check it out. >> thank you very much. >> oh my goodness. >> coming down right now major tornado. coming down another tornado. deadly tornado rushes to the u.s. community of oklahoma city. two mile wide tornado ripped through the state capitol on monday. >> that was the tragedy on the ground but new innovations are being developed in the lab to protect against future disasters. >> we create tornado like vor vortexes. >> i'm at the university where they can actually create tornadoes. >> darryl gains designed and built the tornado simulator. >> a tornado simulator allows us to understand what happens to structures. >> tornadoes are rated on an ef scale which is an indicator of the severity of the storm based on wind speed and debris impact. >> so this was designed to do mid ef 3, about 150 miles per hour or less. >> did you ever sit

let's do some noedz /* [ music ] >> guys, welcome to "techknow." joining me are car a santa maria, shini somara and krista dilworth. i am excited for today's episode because it involves one of the best animals out there, man's best friend, the dog. and cara, you got to play with a bunch of dogs. we know dogs make us happy but they can also potentially make ? >> yeah. so there is evidence to show that dogs can actually detect cancer. and i got to visit the laboratory, some training facilities and even meet a woman whose dog detected her breast cancer. let's check it out. -year-old who grand chap pin rain dance or just plain troy as his family calls him is a pure-bread show dog but to his distinction. >> definitely credit him with saving my life. there is no question about it >> diane's family has a history of breast cancer. so she has been diligent about getting mammograms. in fact, she had been given a clean bill of health a few months before when troy, then a puppy started acting strangely. >> he is nuzzling and nuzzling. i am like what the heck i

. >> dive deep behind these stories and go behind the scenes at aljazeera.com/techknow. follow us on twitter, facebook, google plus and more. >> on tech know, imagine getting the chance to view the world. >> the brain is re-learning how it sees again >> after decades in the dark, >> i couldn't get around on my own >> a miraculous bionic eye... >> i'm seeing flashes >> great >> tech know, every saturday go where science meets humanity. >> this is some of the best driving i've every done, even though i can't see. >> tech know. >> we're here in the vortex. only on al jazeera america. ♪

techknow...'re heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >> welcome back to "inside >>> welcome back to "inside story" on al jazerra america. i am ray suarez. over the weekend the loss of life spiked among israelis and palestinians, the hamas-led government in gaza says more than 500 palestinians have died with the death of four more israeli soldiers, their losses stand at 25. by far the largest military loss of life in years. spokesmen for both sides promised to fight on. does anyone have the influence to bring a ceasefire? and just before the break, ambassador hunter you were talking about both sides

techknow...> we're heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >>> i want to bring neil in. he's on a panel of a couple of crazy scientists, and he's the craziest. when you walk around the economic forum you see a fab lab, and it's the hot thing, thinky places. they are becoming so common that they'll be at weddings and barr mitts farce. in this case it is to do with digital printing, 3d printing. is it the next big thing? what discussion. >> 3d printing is a strange thing in the meed ca that has -- media that has nothing to do with the next thing. let me tell you what comes after it. digitisation... >> a

techknow...> we're heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >> hundreds of days in detention. >> al jazeera rejects all the charges and demands immediate release. >> thousands calling for their freedom. >> it's a clear violation of their human rights. >> we have strongly urged the government to release those journalists. >> journalism is not a crime. >>. >> where there's great democracy there's great tragedy. we can change our attitudes about who gets to love and who gets to die. shooting randomly into a crowd is not the way to do it >>> welcome back. we are talking about the crisis in gaza and israel,

techknow...> we're heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america america mobile app, available for your apple and android mobile device. download it now >>> this week on the show, the plaintiffs who challenged proposition 8, here is a final thought from each of the couples. >> it's interesting to have a group in society that really, really wants to get married. instead of destroying marriage, as people have predicted, could gay people be reviving it because they want it so bad? >> when you want something so hard, like paul said, when you fight for something so hard like marriage, we want to bring, hopefully

"techknow" is next. head to al jazeera.com for updates. >> this is "techknow."a show about innovations that can change lives. we're going to explore the intersection of hardware and humanity and doing it in a unique way. this is a show about science by scientists. let's check out our team of hard core nerds. >> dr. crystal dilworth is a neuroscientist specializing in nicotine research. tonight, e-cigarettes. why they're so addicting to kids and what's really in those

appear [ ♪ music ] >>> hi guys, welcome to "techknow", i'm here with kyle, marita and crystal.s an entomologist, i love a good challenge in the field, there's a scientific mystery that i went to the peruvian to try to solve. look at this weird circular structure. we went down with little information except for the fact that this thing was found on an island twice. take a look. >> reporter: onest best things about working in the rainforest is the adventure. join me on an expedition that's sure to get wet, whid and muddy. the peruvian youngle is a last wilderness with a huge population of endemic plant and animal species. they are found nowhere else on earth. >> why here? it's a unique place in the amazon completely undisturbed by human pressures like hunting and deforestation. it makes it a beautiful, pristine place. six months ago a researcher here at the research center found a weird circular web structure, took a picture and posted it on the internet. little did he know the huge amount of attention it would get as people tried to figure out what it was. we are here with a tea

techknow... >> we're heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >> israel's invasion of gaza continues tonight. >> we have been hearing a lot of tank shelling coming from where we are, here. >> every single one of these buildings shook violently. >> for continuing coverage of the israeli / palestinian conflict, stay with al jazeera america, your global news leader. >> every saturday, al jazeera america brings you controversial... >> both parties are owned by the corporations. >> ..entertaining >> it's fun to play with ideas. >> ...thought provoking >> get your damn education. >> ...surprising >> oh, abso

"techknow" is next, and you can always check us out 24 hours a day by going to our website.eera.com. phil torres >> this is "techknow," a show of invo vasions that can save lives, we'll explore the intersection of hart ware and huge -- hardware and humanity. let's check out the team. marita davison is specialising in ecology. tonight, what are the scientists at monsanta up to. we go into their lab. are they moving away from

onight "techknow" on the road in greenland. >> we are on our way to the air base.'m nervous. >> we are on board for n.a.s.a.'s operation icebridge - flying over some of the largest ice sheets on the planet.

techknow...towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america ♪ >>> president obama was in los angeles today promoting a new jobs training law he signed on tuesday. he spoke to stress the importance of teaching new skills to workers especially in fast-growing sectors like health care. it gives local governments greater flexibility in how they use federal money for training programs. >>> rising college tuition and soaring student loan debt have focused new attention on a small group of schools that have been around for more than a century. they are called work colleges, and they require the student to have an oncampus jo

. >> announcer: this is techknow, a show about innovations that can change lives. this is a show about science by scientists. let's check out the team. dr shini somara is a mechanical engineer. onight "techknow" on the road in greenland. >> we are on our way to the air base. i'm nervous. >> we are on board for n.a.s.a.'s operation icebridge - flying over some of the largest ice sheets on the planet. >> i managed to get into the cockpit, which, for a mechanical engineer, is a dream come true. >> of the the view is amazing,

techknow...towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >> i'm joie chen, i'm the host of america tonight, we're revolutionary because we're going back to doing best of storytelling. we have an ouportunity to really reach out and really talk to voices that we haven't heard before... i think al jazeera america is a watershed moment for american journalism >> now available, the new al jazeea america mobile news app. get our exclusive in depth, reporting when you want it. a global perspective wherever you are. the major headlines in context. mashable says... you'll never miss the latest news >> they will continue loo

techknow...re heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >> start with one issue education... gun control... the gap between rich and poor... job creation... climate change... tax policy... the economy... iran... healthcare... ad guests on all sides of the debate. >> this is a right we should all have... >> it's just the way it is... >> there's something seriously wrong... >> there's been acrimony... >> the conservative ideal... >> it's an urgent need... and a host willing to ask the tough questions >> how do you explain it to yourself? and you'll get... the inside story ray suarez hosts inside story wee

techknow...re heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >> consider this: the news of the day plus so much more. >> we begin with the growing controversy. >> answers to the questions no one else will ask. >> why did so many of these people choose to risk their lives? >> antonio mora, award winning and hard hitting. >> people are dying because of this policy... >> there's no status quo, just the bottom line. >> but what is the administration doing behind the scenes? >> real perspective, consider this on al jazeera america >> welcome back to "america tonight." we'll have more on the situations in gaza and

techknow...'re heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >> now available, the new al jazeea america mobile news app. get our exclusive in depth, reporting when you want it. a global perspective wherever you are. the major headlines in context. mashable says... you'll never miss the latest news >> they will continue looking for survivors... >> the potential for energy production is huge... >> no noise, no clutter, just real reporting. the new al jazeera america mobile app, available for your apple and android mobile device. download it now >>> today's data dive finds a new normal on sleep. conventional

techknow... >> we're heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >> disappearing polar caps... >> in the arctic the prize promises to be much substantial >> untapped resources... >> the really big expense hasn't been tested in the arctic >> could climate change reveal new battlefields? >> countries are developing combat capabilities fault lines al jazeera america's hard hitting... >> they're blocking the doors... >> ground breaking... >> we have to get out of here... truth seeking... award winning investigative documentary series the battle for the arctic only on al jazeera america >>> if you have a bill,

techknow...re heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america the most important money stories of the day might effect your savings, your job or your retirement. whether it's bail-outs or bond rates this stuff gets complicated. but don't worry. i'm here to take the fear out of finance. every night on my show i break down confusing financial speak and make it real. >> israel's invasion of gaza continues tonight. >> we have been hearing a lot of tank shelling coming from where we are, here. >> every single one of these buildings shook violently. >> for continuing coverage of the israeli / palestinian conflict,

techknow...g towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america @ consider this on al jazeera america >>> when you think of a mentor, at lease when i do, i think of an older worker teaching the ropes to a younger employee. but there is a shift going on at a growing number of companies. tech-savvy 20 somethings are passing their knowledge up to an older generation not wanting to get left behind. mary snow has more. >> reporter: at 50 years old and the chief human resources officer at mastercard, ron is used to being in charge, except for one thing, social media, creating his professional twitter account in december of 20

techknow... >> we're heading towards the glaciers >> a global warning >> is there an environmental urgency? >> that is closer than you think... >> even a modest rise, have dramatic impacts on humankind. >> how is it changing the way you live today? techknow... every saturday, go where science meets humanity... >> this is some of the best driving i've ever done... even though i can't see. >> techknow... >> we're here in the vortex... only on al jazeera america >> you may have heard the disturbing story that reaches into a dark part of ireland's past. bodies of hundreds of of babies, the children of ireland's so-called fallen women have been found unceremoniously dumped, some in a septic tank, in unmarked graves, so too are more complicated parts of the tale. we learned more from al jazeera's lawrence lee. >> these women want to know more about who they are, and as well as helping the living they want to know more about the dead. they were all born at what was ireland's biggest mother and baby home