story about survival. home and go get the tennis. i was the only one. what like music in nazi germany. watch now on youtube dw documentary. it came from the direction of the sun. no telescopes are coming in february 2013 allowed shock waves last it's proved the russian city of chilling events, injuring hundreds of people. a meteor had exploded at an altitude of 30 kilometers . it measured just 20 meters across the cost, extensive damage. how can we protect ourselves from the threat of space rocks curdling towards our planets? and more coming up on tomorrow. today, the dw sign show the giant asteroid totals towards the threatening to bring huge destruction

thankfully right now, just hypothetical astronaut products on the guest is familiar with projectiles from out of space driven research expedition to on talk to. he collected meet your rights fragments of asteroids smooth. i'd like a game, of course with very show that asteroids will collide with the know including larger ones. although we don't know the exact pull, the ability. when it does happen, we'll need to defend ourselves. but 1st, we need to know how to defend ourselves, stuff in this. this would be, that's good. that's why the hair approved named after the greek goddess of marriage is now on its way to an asteroid. for closer examination, the european space agency pro or travel for 2 years to reach the asteroid dime office. this will be the 2nd visit to the asteroid.

in 2021. that's the lowest approach. as a test, it deliberately crashed into the asteroid, the so the team of scientists observing from a huge success the experiment, not the asteroid, of course. now the european hair approach will study the impact crater on dime office. in september 2020 full on and off across, waited on the thomas at cologne airport. it was to transport the pro, which is about the size of a many bus to the rocket launch sites in the us. the have a project manager was on hand to ensure everything was done correctly. so today is a very special day uh for your uh, we're writing literally a page of space. these 3 where shipping be here, a spacecraft,

uh to the launch site in florida. it is a project that goes beyond march or bates is what we call. i mean for planetary mission to reach and last joy and study and find the dates. planned very defense, which means human kinds ability to deflect the asteroid and for the planet or hara is expected to on so many questions. what is the asteroids math? what is it made of? how long? which is the crates are left by the collision with the nasa approved dime office break apart completely. and it's now just held together by its own gravity. the nasa approved impacts change the asteroids course. scientists know this because dime office old. it says a moon around the logic asteroid the impact schultz and it's all of it. so instead of 12 hours, it now takes time office just 11 and a half hours to over it is launch at partner to the head of the

pro. it was assembled here at the gym and aerospace company o h. b in breyman. companies for more than 18 countries contributed, puts on expertise. gemini played a major role. for example, the cameras with developed, manufactured and tested by space company unit of tronic. this raw, the inconspicuous rectangle conceals and many such a light level lights or a hatch will open here in the spring when they check the satellite. that will fly to the asteroid and please positivity must wheaton's eggs. this is what it will look like in space. 2 cubes, that's the size of a shoe box will approach the asteroid. that gives us will slight nominated for a couple of months. now. like for every spacecraft uh at the end of its life. before switching off we'll, we'll try some experiments. so you have an fest with lands on the more force,

retrieving the, re there in time, less to gather information on the gravity field from the surface. if the mission succeeds and full 12 hara instruments function as intended, scientists hope to develop models for defending the earth against asteroids. right now, we don't know enough about them. escaped, want to see the others. could they do very die. some asteroids and made of rock? while others are made of iron and have a heavy eye in cool life, the then the red light to comment like ones made of frozen gas and das installed. this means this effect, the structure of composition and density are entirely different. so any defense mission would need to be planned and taken to account the well, the asteroid is made on the sun, the most asteroids festival through space without ever posing a threat to. but if a launch asteroid with a strike, it could be catastrophic. it was likely an asteroid, the white top, the dinosaurs,

for example. but after the head of admission, we should be better prepared for the future. for dinosaurs, best, faithful asteroid signal the end. that was 66000000 years ago. the pre historic giants had ruby earth for some 170000000 years. then we'll know for a 1000 species, some were carnivores, others fed on plants. we're still learning more. in fact, just recently, scientists and germany made some stunning discoveries. for the paleontologist at the museum of natural history, understood god this dinosaur fossil offers unusual insight into prehistoric diet. many of the fossils here like this example, so are exceptionally well preserved. munsey, so you can see the vertebrae of

a smaller via so that's what i read, that helps us understand the food chain. so who ate to this small, brightly colored terrace or doesn't have an under bite, its teeth and johns are perfectly adapted to scoop up its favorite meal. when samuel cooper studied the fossil closely, he discovered what this creature 8180000000 years ago. very excited. yes it's, it's very nice to look on this. i'm actually quite a story materials that the specimen was collecting, mold and 70 years ago. and in here, this black area is the remains of the fossilized stock. and in the stomach, we find the remains of slowly some fish buttons. this small terrace, or with this last on diag jested meal has helped to advance kindly into logical research. so full help build the full we could only guess what terrace was 8. based on the shape of the teeth, but now we have direct evidence of

a hill to help him direct him. vice sup haley ontology stood guard, also made a surprising discovery about the diet of another terrace, or based on all new research, you know, actually and final, forty's was actually eating squints and not fish. so, but it's the right top of the page. but for the wrong parasol. so this terrace army soon have to give up its fish to a smaller cousin, at least until additional research reveals what else these predators might have eaten. there are thousands more fossils, interested guard, and perhaps one of them could hold. the answer is something on hill. this collection is a dream. all location here is fantastic. we have so many all kiddos you go sites, go to the next fossilized dinosaur good. my just unlock new secrets, something i think we, we've read off the sign is a fish eats reptile because quite often we find brett cells eaten fish. but i'm sure there's a possibility that the tables must attend at some point,

but we haven't found the fossil rims but new findings on a par with our fish. and squint eating terrace stores could take a few more decades. in the it's no coincidence. some terrace, or is hate simple. upon similar to hosp, to places they belong to. one of the told was known animal groups on her can have colonized the oceans for over 500000000 years. and according to a study by the max planck institute of animal behavior, when they hunt, they don't work alone. octopuses are team players, unless they're on the run. although this may look like a fight, it's actually a clever joint hunting strategy. a team of researches from the university of constance was the 1st to study this unusual behavior in the red sea. they filmed

octopuses on fish hunting for food, and idolized the footage with the computer. no, no. the results showed that the behavior of this mixed group is small. so then scientists realized for me, it's interesting because most of the times multi species groups i've thought of, as you know, way more down than the cause specifics, because it's assumed that only con specifics could have complex interactions and solve complex problems. but what we see, that's actually not the case with its long tentacles. octopus can force praise, such as mollusks in small crowds, out of that hiding places. the fish then take advantage of this. by following the octopus bought the fish also contribute to the hunt. tier a red money, it is leading the octopus to a spot where there's more food still. it's the octopus that calls the shots.

it's not only about being forward and pulling. it's also being on the back and saying, no, no, no, we're not going this way. we're stopping here or no, no, no, i don't like this option. you have to look for other options. also up to passes. i can see that loan is they do take some of the cues from the fish. so to make sure that while we were seeing was actually collaboration for food and not those types of behavior, we did an experiment where we put fluids on the structure and we found that when it was struck by fish, destructor was 90 percent of the times and thanks for the because of this, we know that the authors following the social information used by the fish the fish a clever to they use the octopus as a tool. the fish are basically using the doctor because there's a pocket knife, right? because they're finding food and then looking at the octopus and say,

come here, come to this location and try to guide it to the prey. but the opposite was, doesn't let the fish do as they please. a fish that doesn't pull it twice, might get a swipe from a tentacle. the scientists are planning to take a closer look at the system of mutual control. we know that there's a suspicious level of recognition y'all to please knows which ones are the collaborators and which ones are usually the exploiters spots. we want to understand if there's an individual level recognition, the team plans to tag individual fish to observe with a recurring person, see much in the group social behavior to uncover more of the secrets of this underwater world. so when marine life work together, how do they communicate? fish are not as mute as they seem. they make sounds. and of course,

the less ambient noise there is the better they can communicate. a lot of marine species are dependent on their hearing to survive. so man made noise poses a serious threat to them. 1 this is what the ocean is supposed to sound like the but today it's often sounds like this. the, the united nations says under water noise pollution is a major threat to marine life. in northern norway bio acoustics expert hika investor has spent more than 20 years studying why oceans are getting

louder and identifying the source of the noise was by surprise. we have 3 different 100 phones, and in the back, we use a set up that includes a hydrophone, a camera, a recording device, and so on. by the german marine biologist has dedicated her career to study and conditions in the left photon islands. you'll see what i saw being critical diversity of species of what sales i knew i had to come areas with a lot of wells like here in northern norway are good if you study acoustics, then social animals that communicate a lot are the most interesting into percentage but there's an ongoing conflict between marine life and the sources of noise, much of it caused by humans, refunded i push to a logical with head straight to learn to go out and drop our hydrophone. then we'll

head towards both those boats over there. for example, are very noisy, there's safari books, we'll probably hear them later. along with wales, safaris and cruise trips, military exercises are also on the rise here as we hi. so we'll stop here, submerge the hydrophone, and listen to see if anyone is in the bay, altering the motor off. now, the minus button will to also be under water microphone. detect sound waves, which travel about 5 times faster and water than in air. we're probably hearing the military vessel anchored there in the background because that's what it sounds like on, but there's another boat chugging along quietly. and then there's the sound of the waves on time and have an event because there's something else to the main reason. the marine biologist is here. invest fjord is an inquisitive,

minky, where would you like to listen, tom? who is there on the various noises here. the boats that are basically always here, the fish finders on the fishing boats, which are a type of cell not. and then there's the military shown are that's very loud, but thankfully less common sense. then there are size, make surveys, looking for natural resources like oil and gas to those are air candidates, which i pick up here, even though they're 300 kilometers away. and we think about other scientists say they can be heard from a 1000 or even nearly 2000 kilometers away. and by talking to me top i to on come under water noise, can disrupt the cell structure of marine life, caused stress and interfere with communication, predator prey, interactions,

orientation and reproduction. all marine life is affected by a we'll use a sound to see and navigate the dark underwater world or to locate prey. that's what we called bio shown or, or eco location of all the points of sufficient enough men be abused. it's the wheels hearing is damaged, it can no longer do this piece of august to be split hot, kind of a switch. grandma, who knows people, it does have a strong nation and it will likely lose contract for this family. which ultimately also means, gets for the way let's and pushed and towards it. and norway had planned to open its waters to commercial deep sea mining. but in december 2024, after a mass of protests from environmental as the plan was put on, hold up here, you'd think everything's fine. it's all quiet. but when you purchase the hydro phone, you can us everywhere. our machines are making so much noise outside interfering

with the entire marine ecosystem and nothing the closest came off. the recorded sounds are now being analyzed at the regional campus of boulder university. let's look at what we saw earlier. this is a spectrogram. it also shows the volume, the small thing down here, we see this is almost entirely noise its own rate. if there were any well sounds in here, we hardly see or hear them see under water noise pollution is an increasing problem. it's been doubling every decade for the past 40 years across the frequency range. before in the forest and see a dear, we don't move, we almost hold our breath, because we know that the slightest sound will make 50 or vanishes. but when we're in a boat and we see dolphins, we turn up the throttle full speed ahead, which is

a nightmare for them. fired off on us of the fall. i have tone 50 said to you, but the noise of human activity is diminishing. the biodiversity of our oceans and changing their unique sounds. 2 thirds of the earth is covered with water, potentially offense, supply drawn for drinking water. but 1st, the salt has to be removed. one viewer from columbia set just a question about that. how does a decent a nation plant when there was various ways of turning, c will to into fresh water. 2 methods commonly used on an industrial scale. the 1st is distillation. from the vacuum precious, the water is heated to a 115 degrees celsius. as the water vaporizes it leaves the salt behind, the vapor flows through cold pipes, turning to fresh water,

but also more than 20000. these are the nation plants worldwide. who are you about 20 percent use distillation? the 2nd method is, was, this was moses. and this method was who is forced under pressure through a membrane, the semi permeable membrane that's water molecules posts through. while blocking substances like salt and minerals, the water on the one side is still free, while the other is very salty. even though the cost of diesel, the nation has dropped it still expensive obtaining drinking water from a 1000 liters of rid of water costs just fine if you are sense. well, just one of the 2 of sea water costs, $50.00 or a cents. in addition, both methods require a great deal of energy, much of which still comes from fossil fuels. but some smaller, these are the nation plants can now meet the energy needs with renewable sources.

obtaining 45 liters of pure water through this on a nation requires a 100 liters of sea water. what's left is called brine. this extremely celtic low in oxygen and often contaminated with chemicals before it's pumped back into the ocean. sometimes some of the salt sodium fluoride is filtered out, but the broiling also contains magnesium and potassium, which has conditional uses. however, extracting these minerals is costly on energy intensive. researches are exploring none of filters and other methods to see how valuable materials on elements can be recovered from brine more efficiently. what are stars made of? how many colors can butterfly see? could have robots have babies one day? do you have a science questions then send it to us as an via text or voice message?

if we answer it in the show, we'll send you a little gift as a thank you. so just ask the new york use of bustling mega cities, famous for many things. huge skyscrapers impressive bridges, the statute of liberty. but what you might not think of is well, sharp and don't fit the marine mammals have returned to the atlantic coast of new york and are now a common site at certain times of the year. one local resident has captured impressive footage. while i grew up out here and it's such a beautiful place, and so i always felt connected to the environment and to the beach especially. and so when i saw it changed drastically from one year to another. i wanted to figure out what was happening so we

never saw a box or dolphins, or tuna, or really any animals from the beach until 2019. and that was like the most drastic changes they could see how back 200 feet away from you. lunch feeding on manhattan . these creatures that we didn't even know where are these. i didn't even know we're in new york. in the late summer, humpback whales can often be seen of the kindest of new york almost every day. so lynch flies, his drone over the shore line of the hampton on long island. typically i'll search for large schools of men, hayden, the bait fish, and see whatever is praying on the mountain. hayden, the small nutrient rich fish are a vital food soles from many low, which means

b c's, including shocks, dolphins, and whales. they are most efficient by humans and used as a nutritious feed, and i co co to unpack food 5 years ago. the state of new york, costa low limiting industrial net fishing of money, hayden, near the coast. lots along with other fishing legislation for many launch marines. b, c spiked to new york's coast. over the years, a lot of atlantic states have decided what we're going to put conservation 1st and we're going to put the health of our coastal eco systems 1st, rather than letting a lot of commercial activity go on in those near shore areas. so that's allowed those predators to now move back into those historical near shore areas and feed where they were, you know, 50 years ago where, you know, we've kind of forgotten about that. all of the atlantic coast where it's so urbanized such a lynch as a small studio in this comes i just got rich the photographer and videographer says

he's work on social media including footage of cow nose res, migrating off long island. and that's why i'm in this incredible geometric formation like birds lining up best on the parallel sides. it's their, their wings. the goal or what i've been after, at least this summer, is trying to find new spaces and kind of round out the picture of the ecosystem overall and help people understand how diverse new york waters are and how and credible these creatures are a young, great white shock, and i'm a head shot. those quotes on camera, the category to spanish shops, typically not dangerous to humans, hunt for small fish near the shore line. the return of a thriving coastal ecosystem provides such a men with plenty of inspiration,

he's with that's all for this edition of tomorrow today. we hope you enjoyed the show. see you again soon. the

look, there's some right there. the commissioned oil pumps are a big environmental thresh in texas. i'm here to see what's going on at the center of it. and the problem is lessening as the old wealth bucks of professional carries expensive, very expensive. you can banker up and oil companies in 30 minutes on the w. this city is hungry for the future. in southwest china. that says the 2000000 people live here. many of them are

young and then the parents wanted me to become a civil servant, but i didn't like the idea of getting such an old fashioned job and being stuff making money, having fun with nice schools. intone, saying in 75 minutes on d. w. the people in trucks injured when trying to feed a city center and more refugees are being turned away. support families in syria, these creative suite, again, straight to if he explained to his son around the world more than 100. and we

should have to spend time for my nephew, he read the city, we don't know what is going on. where is mohammed some of these side pull and we told him go, but the other side below those you know, they didn't get him back. so the was stuck in a meeting, well, how much sub i fled from northern iraq. and he became one of hundreds of migrants to vanish every year. somewhere in the no man's land, the lines between batteries and pony we rescue cheese become pools in a cruise to a single conflict. missouri,

i'm afraid i'll never see him again. no. where? oh you lost under the stops december 18th. on d. w. the . this is the w news life from the land. gemini, is lita, or left shorted space is a decisive confidence vote, as he fights for his political future in a special elementary session. charlotte has been making the case for why he should remain up a hell of a hell of government. he's widely expected to lose that vote, which would clear the policy uh, the election will say coming out from the program. there is deposed president bashar assad breaks the silence, felt to flee into russia, interest, and statements. he says he planned to keep on slicing, but the russians evacuated him. hundreds of states that in the french island territory is miles south to the west.