yours, which could harbor secrets about the future of life on earth. stay with us if you can for that. always more the website, the w. com as well as our social media channels. thanks for watching. take care the these do for fun. vide do gravitational waves squeeze out body. how do i the drums for the to the beat and what's the perfect kill for approx side? find the on says get source with dw signs, don't need picked up channels. the 40 percent of the world population lives by an ocean and 230000000 people live at

less than one meter above sea level. we have no idea how high dams will need to be to protect these populations. what i show lines will need to look like, where people should live. scientists believe it's the water underneath the ice that affects the speed with which the ice is moving. on my next expedition on join professor island hubbard. as he explores this very phenomenon, the state that was the food up there, it looked like from india and i have some also to make sure you finger printing. yeah. if he paid looked at it. yeah. i think you think there's forensic i know is

the okay, if you thing that's cool and that's fine cuz i was gonna get a sign to study the ice in different ways. but those who examined it by climbing down into it can be counted on one hand. allan is one of them. for the past 15 years, he has spent more than 3 months a year on the ice. and when i don't about him, she says, i think it's all the time you can hardly call him a calm and quiet guy. so he's known for doing extreme things like working in the body to deal with them. he's fascinated by, whoops, here in tyson. and he discovers things we're going to be very big toward the inside or outside. we'll say the site is all a complete surprise. yeah,

this is cross cones go a form of pilot of the royal danish and force and chief instructor for survival training on the greenland ice sheet. klaus is responsible for all safety on this expedition of why should i be the most likely to administrate? oh, you know, you also know you complain it'll be scared to be there. just approach at all with respect to you guys. you'll see we take this very seriously. we have our equipment . we check it again. and again, if i might pester you sometimes, but everything has to be right. when we go down, you'll be more on your own than in train and come with it. there is no one to come and get you. something goes wrong during their and the, you're on your own, i mindfully the

a little fun the, you know, that tingling feeling you get and you'll bailey, when you're about to do something exciting. that's what i'm feeling right now. the,

the, the, the, the, there is several big moonlight in this area. this one is the biggest, the we have 5 days to reach the bottom of that. how the plan is we make the big sound up here. this leaving times down here. and the product over there, we'll climb a little deeper every day. you don't climb down into the, on the, in one day or on the streets were a bad 50 k o me and vice a fain to this region of the sheets before. and then some surveys of the movie land

around here, and they have to participate in this region. yeah, hopefully, we're not going inside today, right? we've just checking in with them. i'm a look, see what we're in for. i have a wreck here and the the, the, every summer, snow and ice melts along the rim of the ice sheet, the mount towards foam, sapphire blue lakes and rivers. the

water flows downwards. finding small cracks and crevices. you only need a little bit of water before it will create a big hole, a move walter, deep deep and wide to the the water entering the ice becomes part of the in a structure of the place. yeah. the water flows from the surface into the ice and then towards the sea, the it acts as a lubricant cause like the ice to move it as a great to speeds. imagine ice cube. so on a wet table,

the more water the bank today slide, the researchers of assumed meltwater on the escapes. the ice seems late summer leaving the bottom of the ice drained of water in the winter without to meltwater the ice slides towards the ocean more slowly and keeps more of its mass. all the level of a theory of highly i she moves, has been developed from small palacio is in the scandinavia, the outs. i'm rarely there comes a point where those theories no longer hold when you have big ice sheets and the very st cause. recent measurements indicate mount bullets, it remains under the ice even in winter.

either the channel remains empty because all the mountain walter drains away. well there was a smooth surface of frozen water table. if this is the case, then there may be liquid wants at both and as well as in the ice and water will run off in winter to ah, predictions of how quickly sea levels will rise. would then be too optimistic. careful it never poses in this. when you go see the crack them down here, just in front of you guys, you have to check it before you go cross. this could be snow also. okay. you don't know how far the crack goshen. okay. that's. it's actually the nice dangers time. it used to be up here in spring, the shapes of snow that usually covers everything well, but in all the time you have a little dusting of snow and it hides things, but it's not strong enough to hold you away. it's actually hard. on the 5th

the okay. yeah, we'll, we'll see what you can come and have a look if you like. i enjoy the new foreigners and where i am. stay behind this point, all the info. yeah. the today's plan is to study only the oper meters of the how we need to get a sense of how safe it is before we start descent.

the we really have very little idea of the role of this and the role of these movements and there were 5 thousands and thousands of these across the whole i shape. we have a little bit of g, a physics data radar and the like that we can send things done to figure out what's going on here. we have lots of theories of biotech, only enough, very few of the versions of it. and there's a good reason why there's no observe ations of it, cuz that's quite strange and intimidating prices to go inside every class. they all address though most failed, likely all the just the better of the adventure and this is what it suffice for me . that's the beauty of ice in places and studying with so

what would be not an ice group the so you uh, how big all you know uh 10 years uh much a beautiful or there was

a lot of ours. okay. the huge variety back into the the, i'll do it in small steps. i think we won't go that far today. okay. we have no idea how deep the hole is. all we know is that we each have full, 200 meter long roads. klaus. i'll go down here. yes.

okay. so it's scary. it is. it makes it fun. yes. boundaries are there to be cross. try to turn to the right and lead time to try to enjoy it. i knew is not easy. i need to calm down fast. will take it in small steps the, the

the, the icicles are drifting because it's so warm. today the island says the zip content about 60 meters down the

to go look up a lot of stuff slowing down the,

it's huge. if you drop something and listen, you can tell it still a long way down the i still can't see the bottom. it's bob deeper than expected. i think so. this is as far as we dad to go today, the chair must be 1520 makes is across the smooth and

lower. busy and then have an explore, see where it goes. quite intimidating. i think you find it a little bit exciting than your boss. yeah, it always gets to be in state places with good views and that's uh, got rid of it. the cold winds cold calls. pretty crazy. the all

of it. so strangely sign in to morning. we will need that extra cup of coffee, crowns and dial and have decided i shouldn't join them. the reason is simple. it's not cold enough and the ice is too dangerous. i would have loved to a film that is sent but to be honest, i'm also a little relieved. the primary thing is i use that polls don't on, you know, after our speech icicle starting there will try to avoid, don't nervous about the roots. but all the things that you can't control the thing when it gets to you. how deep are you going to say to me right now? it looks like a 180 meters, and that's as far as i know, nobody has ever gone that deep into the 118 meters. so locked

the you know, going down. i know what do you film it for me? sure. so here's the camera. i don't know if there is a scale for this, but if there is a scale from one to 5, what's this going to be? yeah, tips close to a 5. if most of 5 buys probably won't teach you a long it's too dangerous or is it meant by providing i need the toilet or yeah. or couldn't fail myself if i saw the nurse it's gonna get ready next week. i'm getting to know alan's class this morning. he's storing the

little worried about me. i'm worried about those people dependent on me. i've had a good life leverage. 53 lovely kids. i've heard a lot of fun and a lot of adventure. this been part of it for sure. sometimes i think yeah. well i grow. that's why. well, because i got what i have grandkids the

i'm on the wrong. no, it's all it after a 175 meters cost reaches the bottom. but the many pieces of ice tell them it's not safe to be here. the

greenland inland ice is usually not flat. it's cracked, fence and broken. there's only one explanation for such a perfectly horizontal surface as i have found the frozen water table the oh, how long is the same of doing this? just how do i can dive in here?

we're going to get all this incredible. if you guys go to the organ parts, it is just like nice to own cathedral samples. so massive incredible. it was a few months ago. and what we've landed on here is the water table shape. i want to express the, the other side of that. they are rumbling i guess

it's just it looks very on the plan was to drill through the frozen water table to see if there was liquid water below it. but due to the warm temperature, it's simply too dangerous to be down here. and it will take island and klaus 2 hours to get back to the top, the, the, the, we have to come back when it's colder and the ice is safer. only then will it

be possible for island to carry out these measurements and test these hypothesis that there is a liquid water down down. what i find is really interesting that the water table is so high. c recess. if it's working properly, it should drain a lot water away, but it's not our predictions, it's quite we'll see that we're always could be quite a bit off. that's a complete disaster for the coastal regions of the planet. ready the

i receive a short text telling me to call immediately. it's from jason who is in greenland to walk up one of the oldest research stations in greenland called swiss. com. he has band with his friend and mental professor, comrade stuff and the temperature still looks the range is not that tech, but that can download to data easily. but i don't know why i need to call hey, listen, i'm on my way home, cuz i was ordered home by my employer. family. so here on an airport, i said we,

we lost connie. at this point, i should probably explain who professor i should have them is called a hutch deaf, and connie as jason coles him was the person who got jason into studying greenland . gracie is an ice sheet. he's been a research of a faulty is collecting data before anyone else, even thought about how the climate affects the ice. at 1st, i can't wrap my head around what has happened. but connie is dead. he were working next to and he said, when we last saw him, i'm gonna go and check the data. he just pulled a memory card from weather station hours go by. we start to wonder where he is going look for him. then finding a sense we go into emergency mode,

spend hours and hours like turning the camp upside down. we call to the search and rescue. the royal danish air force. they fly in their taking and for read and a high resolution pictures of the camp. they were, they were circling the camp. i'm looking for footsteps by the next morning we had put enough pieces of logic together to focus on one place. and we sent the ice cavers down. sure enough. there the open floor of the provider that is got water underneath and is clear evidence that something

destroyed lice layer. and then it says water. the thing is that in cold, fresh water, you're not gonna floats. we didn't know his location until it was far too late. so many people loved loved him, come on for so many people and he was a visionary for climate. he started his measurements before greenland was in the headlight the

literally st rescue workers showed their respect for comrade stuff and he meant a lot to them to the the, the

i liked what you were saying the other day to about the difference between risk and hazard and i actually had to was actually googling with the difference between the risk and hazard. and so hazard is something that has the potential for harm. and then the risk is the probability that something actually would happen. i really know that you guys take those risk seriously and i don't can't imagine myself everything. you can't go back there because yeah, let's get the data. we are taking kind of a higher level of safety now that the accident. yeah. has happened it's. it's a reminder that we because has, there's exist,

it's the, the thing is i feel, somehow even stronger than ever that i have to go back. that's to continue these measurements that we started. i think that my life isn't too important to not take that risk. and i, i know that, like connie, people will say that this was a place where, you know, i'm dedicating my life and, and that's what connie did,

the, the, the, we are back at the big moonlight and it is much cold at this time the, this time allan has brought along a friend, francesco soto, a geology professor. the question is whether we will still find

a frozen water table this time around. and if we can stay long enough to drill through it to see if there was liquid warrant out underneath, weren't exactly the same spots. so i'm gps position. looks very different. but the devil is in the detail. the devil is always in the measurements. the field measurements and every time we look at the systems are always so much more complex and far more interesting scientifically. the the the, this time the moon line winds its way down like a spiral. a stand case with various chambers off to the side.

the the the

be careful wire. ice. i talk to flight. crazy. beautiful. come around the corner. we've got another n grey, silver tunnel 6 to meet the of the the good. yeah, we have all the

it's really warm as well. where the water it's from the summer now. i mean randy, you wouldn't want to fall off in it, but it's not cold. temperature, the high temperature rented ac thoughts so that the you have a wireless wired system. temperature, florida pressure on me for insert. it says on hopefully that working but your fingers might be the water table. yeah. i think

okay, here's the is incredibly so it's not a matter of it's just a matter of the that was for the drain the way at the end of the summer. but it's as it contains energy over when suddenly releases that energy into the ice around it and a lowering listed interior region to continue to accelerate not just in the summer, but also in the wind. there's no going back on. it's very, very difficult to bicycle environment back. nothing other than an ice age is

the we found mount water inside the ice, which is new and important information. it might be that the ice contains huge amounts of liquid, want to that final ice as melted the even our best models have predicted in the lifespan about children, temperatures and sea levels will rise files to and foster until the world might well become unrecognizable. one seems

like a doomsday scenario from a science fiction story is becoming reality. we must listen. so the scientists those who say we have no time to waste the nature, is trying to tell us something the or the

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