At least four people have been killed in flash floods in the bolivian city of sucre. The flooding was made worse by blocked drains. A number of vehicles including buses were swept away. The president offered his condolences to the victims. We have covered the story of the disappearing glaziers in the disappearing glaziers in the bolivian amount is which are an important source of water for populated cities and for crops and agriculture generally. Scientists are now saying that these glaziers are disappearing much faster than thought. They are one of the wonders of bolivias majestic mountains but rising temperatures are eating away at them. This glacier, predicted to last until 2025, is melting so quickly it could disappear at any time. Scientists who monitor the glacier say it has been reduced to just a square kilometre. Where once there was an icy field, now there are rocks, some exposed for the first time. Translation the glacier has been shrinking by between 25 and 30 metres each year from the 1970s until the present day. Since then we have seen the lake has receded by up to 800 metres. Although the glacier has been receding for centuries, the fast changing climate has accelerated the process and it has been reduced by over 50 injust a few decades. The reduction of the ice mass is pressuring already stressed Water Resources in bolivias urban areas and it has an impact on agriculture and farming. Translation it has not rained for months. I think it is because of climate change. In november we had a cold snap for two weeks and our quinoa production died. And the sun is so hot it has dried the quinoa. The message from scientists comes with evidence of what has already happened to other glaciers in bolivia. Still a striking view but with no ice to be seen. Now on bbc news, click celebrates over 20 years and 1,000 episodes in front of a live virtual audience and looks back at some of our favourite moments. Weve been live in the uk, in india and around the world. And this year, we went live in your living room, joined by click fans from across the globe and masterminded by a director. And his assistant. Laughter. Woman keep the cat i thought i prepared for everything but not. Not for the cat . Not for the cat. Hello i get real people . Youre the first people ive seen in nine months oh, my goodness people cheering and applause. Its Lara Lewington hello so normally at this time of year, we like to look back at our best bits from the last 12 months but around this summer, it became obvious that no ones gonna want to look back at 2020 ever. So were not gonna look back at 2020 because, fortunately, this is the year that click turned 20, so we thought we would look back at some of our fave moments ever. Lara, of all of the places that youve got to go, is there can you just say one place that really sticks out . Is there is it possible to have one place . Yes its difficult but it has to be my trip to norway. We did a sustainability special and i think this shoot is something that will really stick with me forever. We went out on the fjords with an underwater drone and youre there on a boat on the fjords with the most stunning surroundings, then you see what is going on under the water. It was really quite something. If you want to see what goes on beneath the surface, where everything was completely immaculate above it, this is a real eye opener because this underwater drone could see plastic all over the surface, there are apparently cars under there as well we did not actually see any on our trip but the people i was out with had seen them before where cars had just been dumped on the ice and the ice had broken and the cars had fallen into the fjords. Really an incredible sight. We asked each member of the click team to pick their most memorable click moments and first up, a man with a reputation for breaking everything that he touches. Case in point, the unbreakable phone in 2010. Its dan simmons cheering and applause. So, dan, you broke the unbreakable phone. Then in 2016, you were given something even more spectacular to try and break . Yeah. Yeah, we travelled to Central China to a place called zhangjiajie, where they were busy making a glass bridge. Unlike me, they hope the thousands of visitors that will come here wont be too scared to look down 300 metres through the worlds highest glass walkway. Each panel of the walkway has three layers of toughened glass, held together by glue. Chuckles. Well, the president has given me a hammer and said that even if i can get through all three layers of glass, i wont fall through. Here goes. Ooh it was absolutely incredible. It was stunning. I mean, those pictures look stunning. Its a stunning part of the world. But yeah, it didnt break, it was it was fine. I did insist that the president of the bridge stand on the same bit of glass that i was standing on, just in case back in 2007, dan and i went to San Francisco looking for start ups that were going to change the world, didnt we, dan . Yeah, we did, and we took a few quid with us to find a start up that we could invest in, because thats the way that it was done back in 2007. Who did we see and who did we not give the money to . Well, we saw twitter. We did not give the money to twitter, did we . Nope because we thought nahhh. Laughter. Yeah, you found a start up that was making electric cars and remember, this is a time when electric motors really did just mean milk floats and golf buggies. What was the name of the start up that you found . Its a small start up. It was called tesla and they they invited us along for me to try literally the third car that they made. And we took it for a spin. The roadster has a good pedigree its ultralight carbon fibre body is designed by lotus, based on the elise and thanks to new battery technology, it can go three times as far as the car wally built. The first hundred of these electric supercars roll silently off the production line in october. But what a success did you have any idea back then of the success that tesla may have . I do you know what . I did have an inkling, and i tell you why i did because of the performance. Tesla always went out right from the get go to say this you know, were not talking milk floats or golf carts. We are talking serious performance cars, and they captured the imagination of the public. Dan, thank you so much forjoining us. It has been wonderful to see you. Cheering and applause. After dan, lj rich, who has done a ton of stuff for us over the years. Her fave moment the time she went on a vr roller coaster while on a real roller coaster. Seriously, dont ask. But shes been spending lockdown, well, as only lj could. Hello, lara, hello spen, hello click team and hello audience ive been immersed in al music creation, among other things. I got really into style transfer, where you mix two songs together. See, i can do it without computers, so how would an ai do . I programmed ai queen to sing let it go from frozen and ai beatles to sing call me maybe. Heres my number. So call me maybe. Its hard to look right at you baby. So so hang on. This is the beatles doing carly rae jepsen, yeah . The algorithm works by sampling tiny slices of audio from everything the beatles ever made and then picks out things it thinks fits, and thats based on training models, and it takes nine hours to make just one minute of music. So i was heavily supervising the model every four seconds into the early hours of the morning. Oh, my god. So it is also an exercise in endurance. 0h, lj, thats brilliant and also, it is just so you. Ai and music how much more you could that be . Cheering and applause. Well, here at tokyo university, researchers have moved the ideas of Science Fiction one step closer towards reality. This is richard taylor, the man who started click, reporting from japan. A camera projects an image of the background onto a coat like this, which is made up of thousands of tiny glass beads covered in aluminium. Its a retroreflective material which shines the light straight back at the direction it came from. As yet though, this invisibility cloak is an optical illusion that would not really fool anyone. And even for this rather crude incarnation, the conditions have to be just right. Not only is there lots of kit involved, but any movement and perspective behind the camera soon gives the game away. Invisibility would bring incalculable advantages on the battlefield. To make the object appear invisible, it would be blanketed with lots of flat screen display panels. Each panel would contain a tiny camera to take images of its surroundings. These images would then be transferred to display panels on the opposite side of the object to create the illusion. Yeah, i mean, that idea in particular was so left field the idea of miniature cameras that then project the scene behind the tank onto the tank. Pretty crazy. Notice in the script i said one step closer to becoming fact i mean that that particular idea never went anywhere. Except there is actually a Canadian Company that recently filed a patent for a different kind of invisibility technology, actually also intended for use mainly on the battlefield, to cloak tanks and jets. And its a material that kind of bends light and they called it its very bond like quantum stealth. Quantum stealth . And it actually does look pretty good. Laughs. Yeah, of course, right . Why not . You know, youve got to give it a sexy name thats marketing 101. Yeah, thats true. Pull the trigger. There it is and lets not mention the time that richard and marc cieslak played laser tag in real planes, richard treating the plane like it was a video game. Hard right. Yeah yeah, rich was he was abs he was really, really ill after that because he was chucking that plane around the sky like they were going to take it off him. Marc is our video games guy and hes spent a lot of time and effort explaining the Games Industry in an Alarming Number of costumes. Laughter. Here he is running in slow motion into battle. Ladies and gentlemen, welcome to the console wars. Here he is inside a vr video game. If vr is going to make it to the next level, developers have to design bespoke experiences for vr goggled gamers. And here he is inside a computer, living out his 1982 boyhood fantasy. Watch out, marc theres a visual effect straight ahead whoa hello audience hi, lara, as well 2021 in gaming well, most conferences have gone online this year. Do you think that we will see shows like e3 in la come back, or have we nowjust moved away from the big, expensive conferences . Oh, i think theyre going to come back. This year has kinda proven to us that trying to do all of those big shows online, you just dont get the level of excitement that you do when youre, you know, on the in the conferences, when youre chatting to the people that have made the games, all that kind of stuff. You as a journalist, you dont get the same level of access, you dont get to talk to the people that have made the games in the same way. So for me and also a lot of people that i have spoken to over the course of the year i think there will be some really, really big in person video games conferences come back as soon as they are able to come back. Whether that will be next year, we will have to wait and see, but i think from the perspective of a lot of the video people making games and a lot of people actually making the hardware as well, this year has not really worked for them trying to do everything online. But, hey, you know, that is the same all over with almost every single industry. 2020 hasnt worked for anybody. Well, lets hope for the best for 2021. Everyone, marc cieslak cheering and applause. Yay now, since almost the beginning of click, kate russell has been our trusted guide to the web. She has webscaped in every studio that we could throw at her. But deep down, she is a space nerd. Kate russell, everybody cheering and applause. Hello this, kate, is your most memorable piece from 2017 space robots. Meet superball a tensegrity robot in development in nasa ames. This lightweight sphere like matrix can be packed down flat, taking up minimal space in a rocket and vastly reducing launch costs. Because of the unique structure of this robot and the fact that it can deform and reform itself and take massive impacts, eventually nasa will be able to literally throw it at the surface of a planet and its scientific payload in the middle will be protected. Its bouncy once deployed, superball can handle much rougher terrains than a rover, rolling right over obstacles and up and down hills. Tendon wires connecting the struts spool in and out to create momentum, in much the same way as flexing your muscles moves your limbs. What were going to have is a future of humans and robots really working together. So the biggest question perhaps of the day for me is can i drive k rex . Definitely lets have you do that. Yes now, lots of few think we click reporters have the bestjobs in the world. But after spending a day at the roverscape testing ground, i think there is another contender for that title. Giggles look at that face that is the face of a kid in a toy shop there and look what you were driving the robot with my whole life, people have said, stop wasting your time playing games and there i am at nasa, driving the mars rover with a playstation controller. Thats what they say though, isnt it . That the next generation is so used to using games controllers that that is the natural thing for them to control technology with. Any update on the nasa robots . Well, nasa takes quite a long time to develop things and actually get them out into space so, no. But there is a team at uc berkeley who are designing that using that tensegrity design to detect flying drones, so that should be interesting. Youd would be able to fly your drones into things and theyll just will bounce back and keep flying. All right. Its kate russell, everybody it has been said that once you join click, you never really leave. And that means that a couple of the newest members of our team have actually been with us for quite a while. Lets cross to them now. Please welcome 0mar mehtab and paul carter. Hello, how are you . Hey. Hello hows it going, everyone . Paul, youve picked something from all the way back in 2018 . Thats right, yeah. Me and 0mar went to switzerland to check out some new tech around firefighting. We went to check out a device to help firefighters detect heat in a burning building and also something i was very pleased about a firefighting train. Now, switzerland may not be the first place that comes to mind when you think of fire. But its surprisingly advanced when it comes to firefighting tech. For example, its the only country in europe to have a firefighting train. This cabin is actually pressurised, so in the event of a fire, this can be operated as a safe breathing environment. Dramatic music electronic music i was over there with him. I was there, working my socks off, and then i turned around and ijust see him grinning from ear to ear, just loving it, being on that train. It was, like, the most wholesome thing ever. Brilliant lets turn to 0mar. Cheering and applause so, sam battle is a musician and youtuber who loves tinkering with old tech, so hes got a whole lot of speakers, you know, game boys, he also had, like, a furby organ. He got, like, 30 of them and he was playing music with it. It was really. Weird. That sounds demonic oh, it is demonic. This is basically 48 game boys and it basically sounds like an orchestra. For instance. Machines play one droning sound that crescendos but after a quick modification, the keyboard doesntjust play game boys anymore. Ah i was very close to that omar squeals look out did you squeal there, 0mar . I was going to say 0mar, that was some some squealing going on. I mean, yeah, i did squeal. The reason i squealed is because just before we turned the cameras on, we were testing out the flamethrower and it went so big that it singed his hair, and so i was genuinely fearful. Like, 0k lets calm down a little bit, you know . Chuckles so its amazing to think, really, isnt it, 15 years ago, youtube was already a thing but the concept that that people could carve out huge careers online just didnt seem real at the time, did it . No, it didnt and, you know, i mean, weve gone from people making online videos and showing them, you know, around the world to now, you know, peoples careers getting so big i mean, weve got Floyd Mayweather junior fighting a youtuber soon and thats its based off the back of his fame that hes put up online. So you can actually build a real, proper career out of this, and its only going up and up. Seems like theres no end. Totally. 0mar, paul, thank you so much cheering and applause thank you. Next up isjen copestake jen, welcome jen, good to see you. Jen joined click back in 2013 and has been super busy over the last year especially, covering health tech pieces during the pandemic. Shes been all over the world for the show as well to israel, las vegas, china. How has it all been for you, jen . Its been absolutely amazing and its so lovely to see everybody today. My favourite times i think on the show, though, have been in china. Theres been some Incredible Technology that ive seen there, and one of the most Amazing Things was actually getting to play sport with robots. Whoa laughs the robot is designed to be as much like a human player as possible. Its eyes are the hd cameras at the back of the court. These computers send prediction data on where the shuttlecock will fall back to the robot via bluetooth. Is there any more news on that badminton robot . Yeah, theyre still theyre all taking part in competitions and theres Different Companies and universities across china who are developing these robots and theyre winning competitions. Itsjen copestake, everybody cheering and applause nice to see you welcome to the Aletsch Glacier in the swiss alps. Weve tried some world firsts over the years, and one member of the click fam has been instrumental in them all. Stephen beckett produced the worlds first show shot entirely in 360 degrees. And in 2015, he and i entered our Mad Laboratory to try and teach an Artificial Intelligence to walk. Were definitely getting closer to that all powerful machine. If only steve could keep it upright. But then, in a moment of realisation, he cracks it so ai is this in some ways, its a simple concept, isnt it . Its brute force. You chuck it a problem and it tries millions of times, getting it wrong most of the time, occasionally getting it right, and then taking that answer and improving it by trying millions and millions of times again thats basically how ai works, in a nutshell. Youve summed it up. Thats the whole field of research. Youve done it. Laughter but no, but i mean in the case of this qwop, in the case of qwop, we it played the game thousands or hundreds of thousands of times and eventually, kind of through genetic a bit like evolution it figured out the best way well, the best way it