the young people clearly have the solutions, the future is 77 percent. every weekend on dw it came from the direction of the sun. no telescopes are coming in february 2013 allowed shock waves last it's prove the russian city of chileya bents, 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 say good game, of course with very show that asteroids will collide with the know including larger ones. although we don't know the exact all 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 dine wolf

or 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 knocked the asteroid. of course. now the european hair approach will study the impact crater on dime office. in september 2020 full on and off craft waited on the thomas cologne bone 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 henry 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 so that launch sites in florida is a project that goes beyond march or bates is what we call, i mean for planetary mission to reach and last joyce and study and find the dates planned very defiance, which means human kinds ability to deflect the steroids. and for the planets or tara 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 did time 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 a 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. it's launch at partner to the have a pro. it was assembled here at the gym and aerospace company o h. b in breyman. companies for more than 18 countries contributed pumps on expertise. gemini played a major role, for example, the congress with developed manufactured and tested by space company unit of tronic use or for this rob, inconspicuous rectangle can seals a mini satellite or the next level later, a hot while i've been here in the spring. when a jack to such a light that will fly to the asteroid and sleep positivity must windsor's base is what it will look like in space. 2 cubes, that's the size of a shoe box will approach the asteroid. the cube says will flight nominated for a couple of months now. like for every spacecraft uh at the end of its life. before

switching off, we'll try some experiments. so you events us with the lands on the march, 1st, retrieving the razor, and tie 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 to then the run light to comment like ones made of frozen gas and das. so this means this surface structure composition and density are entirely different. so any defense mission would need to be planned and taken to account the what the asteroid is made on the sun. the most asteroid settled 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 intense. just recently, scientists in germany made some stunning discoveries for the paleontologist at the museum of natural history, understood god this dinosaur fossil offers unusual insights into prehistoric diet. many of the fossils here like this example, so are exceptionally well preserved. munsey, 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 it 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 to 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 until the logical research. the 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 find the 40s was actually eating squints and not fish. so, but it's the wrong type of space. 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 whole. the answer is something on hill. this collection is a dream. all location here is fantastic. we have so many. ok, don't you go sites go to the next fossilized dinosaur good. my just done lock new secrets, something i think we would really love to find is

a fish. it's the reptile because quite often we find brett cells eating 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 fiction squint eating territories could take a few more decades. in the it's no coincidence, some terrace or is 8 sample upon similar to hosp to places they belong to. one of the oldest 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. 8 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 scientist had 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, the octopus can force praise, such as mollusks and small crops 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 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 presses, i can see that loan is they do take some of the cues from the fish. so to make sure that 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 of the tanks. why the? because of this, we know that the obstacles is 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. this 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 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 too 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 to stay theme. 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 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 hike 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 hydro 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 as dedicated her career to studying conditions in the left photon islands. you'll see what i saw being critical of diversity of species of what sales i knew i had to come to 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 santa 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 boulder. 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 mind spot in 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 here. 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 way. would you like to listen? tom also 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 stone on then there's the military, so not 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 are pick up here even though they're 300 kilometers away. and 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, r or eco location of a oval. the poly to fulfill then be abused. it's the wheels hearing is damage. it can no longer do this piece of august to be real hot kind of a switch. grandma, who knows people, it doesn't 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 and in 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 hydrophone, you can us everywhere. our machines are making so much noise outside into fearing with the entire marine eco system 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 seen 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 a fearful i have tone. 50 said to you, but the noise of human activity is diminishing. the biodiversity of our oceans and changing their 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 on the nation plants worldwide, probably about 20 percent use distillation. the 2nd method is where this was moses . and this method was who is forced under pressure through a membrane. the semi permeable membrane that's water molecules passed 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 $1000.00, leaches of rid of water costs just fine if you are sense. well, just one liter 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 just not a nation requires a 100 meters of sea water. what's left is cool. find 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 bro bought tempe these one day?

do you have a science question then send it to us as a 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 a bustling megan city, 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 so 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 is creatures that we didn't even know where are these. i didn't even know where in new york in the late summer, how not clowns can often be seen off the coast 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 money. hayden, small nutrient rich fish are

a vital food souls for many low, which means b c's, including shocks, dolphins, and whales. they are most likely stationed by humans and used as a nutritious feed. and i could go to unpack food 5 years ago, the state of new york, costa low limiting industrial net fishing of money. hayden, near the coast box, along with other fishing legislation for many large 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 ecosystems 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 co 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 the 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. here's what, that's all for this edition of tomorrow today. we hope you enjoyed the show. see you again soon. the

rushes and vision of ukraine has left the russian minority, latvia, and shock. the war has transformed their lives into a delicate balancing act. as they try to preserve the russian language and culture, while also demonstrating the loyalty to the latvian states. conflicted identities? let us out. in 75 minutes on d. w. the

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