if you put a straight fold into a material, it doesn't become that strong because even if you lock one side of the fold, it can carry on bending, like that. but if you put a curved fold into a material, then as you change the shape on one side of the fold, it forces the other side into a particular shape, too. and that means, if you lock this side into position, the whole structure becomes rigid. the best example i've seen of that is your french fries container, which is pretty flimsy when you're only using the straight folds on the edge, but there are two curved folds on the bottom, and if you engage those, the whole thing locks into place and your chips don't fall out. the bike that we created now, or the chassis that we've done for the stilride one, compared to a competitor bike, it's a tubular frame, a typical scooter. we created a chassis that's even 50 times stronger or more stiff, rigid than the tubular frame.

stilride has bigger ambitions than just two wheels of steel. parts of larger vehicles could also be made this way, along with the footings for wind turbines that would imitate tree roots and... one step at a time, though. the scooter goes into production later this year and it'll cost 15,000 euros. i am shiona mccallum, and it's time for a look at this week's tech news. apple has started paying out in the us class action lawsuit over claims it deliberately slowed down certain iphones. claimants could receive around $92 each from the $500 million settlement reached in 2020.

apple said at the time it denied any wrongdoing but was concerned with ongoing legal costs. a new substance has been discovered which could reduce lithium usage in batteries by up to 17%. the material has since been used to power a light bulb. we think the opportunity for new energy technologies will be absolutely amazing and it is absolutely required as well. so it does fit into our sustainability goals. 0ld green cabinets usually storing broadband and phone cabling will be converted into electrical vehicle charging points on some uk streets, with many of the total cabinets near an end—of—life, bt hopes up to 60,000 of them can be converted to tackle shortfalls in electric car chargers. ces returned with transparent tvs, ai companions and more vr headset among the gadgets on display in las vegas.

tune back into click next week for a look at this year's tech fest. there have been several incidences in the caribbean of people dying. people, get ready for this smell tomorrow. a seaweed called sargassum has been making headlines. out in the open ocean, it provides a marine habitat, but when it hits our coasts, it becomes problematic. from releasing gases which can be harmful to human health, to impacting local tourism and fishing, these massive, buoyant mats, which stretch like a carpet across the atlantic, make up the great sargassum belt. being more than 5,000 miles long, it's wider than brazil. and last year, it weighed over 2a million tonnes, making it a continent—sized

blob of seaweed. in fact, it is so vast that it's visible from space. and scientists have been studying its explosion using satellite imagery. the exact reasons for the boom are unclear, but it's believed that rising temperatures and agricultural waste are contributing to the excessive growth. and on the other side of the world, there's a company trying to fight it. just like any other plant, seaweed photosynthesises. and because it absorbs carbon faster than trees, there's also a lot of potential. and a team here is using this to their advantage. they are building a semi—autonomous ocean robot to sink the sargassum and the c02 it captures to the bottom of the sea. doing so, they prevent sargassum from hitting shores whilst fighting global warming. the ipcc has projected,

in their most optimistic pathway, which is 1.5 degrees or less, that we will need to remove, from the atmosphere, ten billion tonnes of carbon every single year by 2050, which would be, in terms of volume, the largest industry that has ever existed. if you're looking for a good place to put carbon, the deep ocean is perfect. you have more carbon than there is the upper ocean and the entire terrestrial sphere combined. the algaray is designed to go across the surface of the water and take the sargassum into its cavity, much like it's doing with these ducks here. once it's full, it dives down to 200 metres, at which point the water pressure crushes the air bladders that keep it afloat and the sargassum sinks down to the seabed. there it's locked away for many hundreds, if not thousands of years. the first version of the algaray was attached to a remote controlled catamaran,

whereas the final version is going to be a ten—metre long submersible, powered by green energy. the whole thing is going to be covered in solar panels, so there'll be quite a bit of available energy to drive sensors. so in here, already, we've got depth temperature and a camera on the front, and then in the future we'll be able to gather information about wind speeds, temperatures on the surface and map everything. using this information, they are creating machine learning training data, which will then enable the algaray to increasingly make its own decisions, such as coordinating with other algarays to gather the mats. but for now, it's time to test

the second prototype. cheering. applause. that was relatively quick, but that's not how it's going to be in the end? this is only going down to three metres, so it should actually only take a couple of minutes to go down. in the field, the whole thing would be a ten—minute cycle. the aim is for it to be buried, to go into that long carbon cycle. it's sort of like saying, "we're making the oil of the future." anything that was oil was once marine biomass. so it makes a lot of sense to us to start using that as one of the pathways that you could use to get to large scale carbon dioxide removals, but also unlock this tremendous opportunity, but also this tremendous need to rebalance our atmosphere. it's a startup in its infancy, and one company alone cannot solve the problem.

but facing the threats of global warming, it's another innovation to help win the race against climate change. that's it for the short version of the programme, the full length version can be found on iplayer. but next week, have we got a show for you! yes, we do. it's the biggest tech show of the year — the consumer electronics show, to be precise, in las vegas. it's called ces, yes, she can't wait. i can't wait. hopefully we will see you there. thanks for watching and see you in vegas. bye! hello there. a few wintry scenes captured by our weather watchers on friday across parts of scotland,

such as here in perth and kinross. but the severe frost will become a lot more widespread as we go into the start of next week, with the potential for some disruptive snow, too. where is that colder air? well, it's behind the series of weather fronts. across northern scotland on sunday, that chilly airjust spilling down from the arctic as we head through the start of next week across the whole of the uk, with brisk and cold northerly winds blowing. so lots of added wind chill factor into the temperatures. but this is how we start off the day on saturday, with temperatures hovering just above freezing, a few pockets of air frost where we see the clear spells, a week where the front sinking southwards, bringing outbreaks of patchy rain into northern areas of northern ireland, northwest england and north wales. to the north of the front across scotland, some winter sunshine, showers by the end of the day in the north ahead of the front across england and wales, variable amounts of cloud, but also some brighter spells, temperatures ranging between 5—8 degrees celsius. and it's more of the same, too, on saturday night into sunday morning. there will be some clear skies around at times. we'll start to see the northerly wind pick up, brisk

across the northern isles with some snow showers for the north of scotland. but again, to start the day on sunday, most of our temperatures will be slightly above freezing. but then that colder air really starts to show its hand with some snow showers even to low levels across northern scotland, with this feature just running down towards the north, further south as we head throughout the day. but we've still got the milder air with some winter sunshine across england and wales, 7—8 degrees celsius here. but on sunday night into monday, there is the risk of some snow and ice, with weather warnings in place across northern ireland and the north of scotland. that wind starts to really pick up, look at the squeeze on the isobars on monday into tuesday, so wintry showers towards the north sea facing coast with this feature running across northern ireland into southern scotland and perhaps northern england. so here, the snow risk will extend further southwards through the day on tuesday. and then we look to the southwest to see this weather frontjust moving its way further northwards. there is the possibility that as it bumps into the colder air, we could possibly see some snow across the south of england on wednesday, but it's

still very uncertain. so my advice would be to keep an eye on the forecast. it will certainly be cold. there is the greater risk of some snow with some severe frosts by night.

live from washington. this is bbc news. the houthi rebels hit back after the us and uk launch overnight strikes on yemen, with threats that the west will pay a "heavy price" for its actions. but the white house says it's not interested in a war. we will hear from the defense department's top spokesperson. and polls havejust opened in taiwan's presidential and parliamentary elections, with relations with beijing a key issue for voters.

i'm sumi somaskanda. we begin tonight with reaction to the american and british—led air strikes on houthi targets in yemen. the iran—backed houthi movement says the uk and us will pay a heavy price for targeted attacks on them in yemen overnight. us officials say �*just under 30 sites�* were targeted, including in the capital city sana'a. they included what the us called command and control centres, munitions depots, launching systems, production facilities and air defence radar systems. houthi leaders said five people were killed. the pentagon says the houthis did respond with an anti—ship ballistic missile, but it didn't cause any damage. the us and uk—led strikes were in response to houthi attacks on ships in the red sea, which the houthis say is in response to israel's attacks in gaza. fighters have been targeting ships with armed drones and missiles and boarding them. a short while ago, president biden was stopped at a coffee shop, visiting small businesses in pennsylvania, where he gave

his first on—camera statement about the strikes —