this is bbc news, the headlines: oscar winning actress and influencer gwyneth paltrow has given evidence in court, as part of the lawsuit brought against her by a man who was injured in a skiing accident. she has denied being responsible for the injuries suffered by terry sanderson back in 2016. president biden and the canadian prime minister, justin trudeau, have agreed to deepen their countries�* economic cooperation and to stand together against authoritarian regimes on a state visit to ottawa. king charles�* first visit to france has been postponed, as demonstrations continue across the country against president macron�*s changes to the country's retirement age. now on bbc news, click.

this week, get ready for blastoff, we are filming a fire rocket test in super slow motion, and it will blow you away. that went your perfect shade? we have an app to help you build your foundations. shade? we have an app to help you build yourfoundations. and jonah goes for a walk on the wild side, but you don't know what around the next corner. we've discovered something like 20,000 new cars in a short time we have been running the project already. have you ever wondered what happens when a satellite goes wrong? how would you know what was up, how would you know what was up, how would you find out if it had been sabotaged? that's what i have

come to texas to find out. 30 seconds... we are at this 200 acre psychic to fire a hot fire test of a rocket engine. when it first starts _ test of a rocket engine. when it first starts up _ test of a rocket engine. when it first starts up there - test of a rocket engine. when it first starts up there were i it first starts up there were going to be some shock waves. wow. and we are going to do it in a way that even the rocket makers themselves have not done before. ., ., ., before. four, three, two, one. in before. four, three, two, one. in 2022, — before. four, three, two, one. in 2022, firefly _ before. four, three, two, one. in 2022, firefly aerospace - in 2022, firefly aerospace became one of the few us companies who have successfully put things into orbit. look companies who have successfully put things into orbit.— put things into orbit. look at that view! — put things into orbit. look at that view! the _ put things into orbit. look at that view! the company - put things into orbit. look at that view! the company has | put things into orbit. look at - that view! the company has also won contracts _ that view! the company has also won contracts from _ that view! the company has also won contracts from nasa - that view! the company has also won contracts from nasa to - won contracts from nasa to build a lunar lander that will

deliver payloads to the moon in 2024 and 2026, and put a satellite into lunar orbit. but it's the bit between launching from the earth and landing on the moon that has piqued my interest. ~ ., ., ., the moon that has piqued my interest. ., ., interest. we also want to build an orbiting _ interest. we also want to build an orbiting spacecraft - interest. we also want to build an orbiting spacecraft that - interest. we also want to build an orbiting spacecraft that has| an orbiting spacecraft that has the ability to be on call of our customers, you can literally go to a web browser and say i have an asset in space and it is in distress, i'd like a camera shot of it, or it needs to i�*d like a camera shot of it, or it needs to de— i'd like a camera shot of it, or it needs to de— orbit. firefly, can you do that? well, we can. ultimately that will be a consolation of 30, 40, 50 of those spacecraft that are disbursed in the different regions of space and are on—call, available for customers to go over there. i need a pizza on the iss. we l need a pizza on the iss. we haven't really _ need a pizza on the iss. - haven't really thought about the oven system of how we might keep the pizza warm... but we can do that!

keep the pizza warm. .. but we can do that!— can do that! this is a pretty big deal- — can do that! this is a pretty big deal. everything - can do that! this is a pretty big deal. everything that i can do that! this is a pretty big deal. everything that is| can do that! this is a pretty l big deal. everything that is in orbit is going really really fast to make sure that as it falls towards the earth it continually misses it to stop attending courses notjust a case of. and going in a different direction, because it will fall straight back to earth. this needs maths and fuel and lots of both the. the early iterations _ fuel and lots of both the. the early iterations will _ fuel and lots of both the. tue: early iterations will have fuel and lots of both the. tte: early iterations will have a finite set of your but the next generations will be refillable. they will be solar powered, and so they will be able to be recharged.— so they will be able to be recharaed. ~ . , , recharged. what is interesting is one of the _ recharged. what is interesting is one of the reasons - recharged. what is interesting is one of the reasons quoted l is one of the reasons quoted for why you might need to go and check out another satellite is national security. in the example bill gives me, imagine what would happen if a critical satellite mysteriously stopped responding to ground control. every satellite that deploys does not have a 360 camera or radar system, just for weight and space concerns. so sometimes they are blind

objects up there that ijust communicating their piece of data so the ability to go to that region and say check that out for me is critical for national security. out for me is critical for nationalsecurity. is out for me is critical for national security. is there something attached to it? was it moved out of orbit? this constellation _ it moved out of orbit? this constellation of _ it moved out of orbit? this constellation of rapid - it moved out of orbit? this constellation of rapid response satellite is planned to be in orbit by 2025 and before that, firefly is developing a rapid response rocket for the us space force that can be on standby and ready to take a payload and get it into orbit with just one or two days notice. it takes four firefly designed engines to get that rocket off the ground, and if the test of one of those that we are here to film today. is this your baby or one of your babies? ., , , babies? one of her babies. briduet babies? one of her babies. bridget oakes _ babies? one of her babies. bridget oakes will - babies? one of her babies. bridget oakes will be - babies? one of her babies. i bridget oakes will be studying the rocket test in great detail. from an engine

perspective we want to make sure that our engine start up healthy, a steady state, that is healthy, and we are getting the first power levels that we need and a lot of that we can test on the ground because those are the things that we want to make sure are healthy in orbit. what is the height of it? pretty muchjust in orbit. what is the height of it? pretty much just the horizontal frame? it? pretty much just the horizontalframe? it does not go too high? we horizontal frame? it does not go too high?— go too high? we put it on a friend to — go too high? we put it on a friend to film _ go too high? we put it on a friend to film the _ go too high? we put it on a friend to film the test. - friend to film the test. remember gavin? he is one half of these lomu guys who helped me get egg all over my face a couple of weeks ago, and he is going to be capturing the action at 2000 frames per second. that 80 times slower than real life. the only thing is, he, like the rest of us, has to be hundreds of metres away when the rocket ignites. i believe him to set the remote triggers and work out how the cameras will be disseminated and we will come back later in the programme to see a rocket ignites like you have never

seen before.— ignites like you have never seen before. nasa has been -auttin seen before. nasa has been putting rocket _ seen before. nasa has been putting rocket into _ seen before. nasa has been putting rocket into space - seen before. nasa has been i putting rocket into space since the 50s and increasingly it has been working with companies like firefly to deliver its staff. more about its future plans with nasa's doctor kristinjohnson. are left off without a miss one. the item is moon mission signals nasa's continued commitment to space exploration. what significant technological advances do you think make a sustainable settlement on mars a realistic proposition? tote settlement on mars a realistic proposition?— proposition? we have had improvements _ proposition? we have had improvements in - proposition? we have had - improvements in communication, a demonstration of the laser communications relay from the international space station, so laser communication is going to make the pipeline, you can get sent a whole lot more data and has been quite a bit of investment in aland virtual reality. people think the gaming technology is just the gaming technology is just the

gaming but no, so imagine if we had people living on mars, you are going to have to have a way to really to be able to assess what is happening inside the body without carrying an mri whether you. body without carrying an mri whetheryou. if body without carrying an mri whether you. if you can imagine having sensors on your body where you can pull the heart out virtually and spend it around and see what is happening, that is going to be incredible.— incredible. how important the collaboration _ incredible. how important the collaboration between - incredible. how important the collaboration between nasa | incredible. how important the i collaboration between nasa and private companies in achieving a sustained presence on mars? absolutely critical. there is no way that nasa can do this alone and there is no way that all the agencies, the international agencies that nasa partners with, there is no way they could do it alone. you think about spacex and the united states, spacex has gotten where it is in collaboration and partnership with nasa. nasa has invested quite a bit of money in spacex to help get where they are, and we are going to continue working with private industry companies like spacex and some of the new space companies that

are coming out.— of the new space companies that are coming out. does space have are coming out. does space have a role in helping _ are coming out. does space have a role in helping us _ are coming out. does space have a role in helping us solve - a role in helping us solve terrestrial issues as yellow absolutely. the james west space telescope. in order for those mirrors to give individual images we had today. we had a very precisely measure the curvature of those mirrors, so we came up with algorithms and technology to be able to do that, and we did that to scan the surface of your eye very precisely and quickly, so they could determine astigmatism's farsightedness, nearsightedness fa rsightedness, nearsightedness on the farsightedness, nearsightedness on the international space station. we have a system that has to capture the waste water there, the water from your respiration, from your sweat and from your urine and be able to take that and transfer it into drinking water, and apparently good taste in drinking, they can actually take very contaminated water out of a field that is filled with bacteria and be able to process that water to get 99%

of the bacteria and everything out of that so you can have pure drinking water in remote locations. when you have really impossible dreams, impossible goals, if you read for those goals, if you read for those goals and you create things that don't exist to achieve those goals, you inadvertently create incredible revolutionary changes for improving the quality of live right here on earth. time for a look at this week's tech news, tiktok boss testified before us congress to fight for the future of the social media app. this after president biden called for its sale to reduce potential influence by the chinese government. over half a dozen countries have full potential bands of its use on government devices due to privacy and security fears. google has started rolling out its ai chat

but barred. the bbc was one of the first to try it out.— the first to try it out. let's start by — the first to try it out. let's start by asking _ the first to try it out. let's start by asking to - the first to try it out. let's start by asking to write i the first to try it out. let's start by asking to write a i start by asking to write a thank you note for a wedding gift. not bad at.— gift. not bad at. unlike chatterjee _ gift. not bad at. unlike chatterjee pte - gift. not bad at. unlike chatterjee pte can - gift. not bad at. unlike i chatterjee pte can access up—to—date information from the internet but google warned that barred could have limitations in my chair is misinformation. amazon will cut another 9000 jobs as it seeks to save costs with one and a half million people employed worldwide, including cloud computing and advertising. the firm had already said injanuary it advertising. the firm had already said in january it was already said injanuary it was due to axe 18,000 jobs. microsoft has announced plans to launch its xbox mobile gaming online store next year, with an offering including call of duty and candy crush saga, it hopes to take on apple and google. one of the hottest

trends is personalised beauty. brands are creating digital tools that recommend shoppers products like foundation or eyeshadow specifically for their unique skin type. there are plenty of personalisation services out there, but what about a device designed to detect the skin's undertone. skin undertone in cosmetics is basically what we call hugh in science, it's not about is your skin light or dark, nothing to do with lightness, is to do with the colour that runs through your skin so you can be very light and be pink, you could be very light and be yellow and it's very important to know that so you can actually get beauty products that work for you.— that work for you. there are different — that work for you. there are different ways _ that work for you. there are different ways to _ that work for you. there are different ways to measure l that work for you. there are i different ways to measure skin undertone, but the skin colour

chart here which powers the tool makes the method unique. having an olive complexion i struggle to find make up that matches, and being a biochemist, i decided to look into it and i discovered that beauty magazines were recommending, look at your veins and that will help determine your undertones. we realised there was no way that skin was being classified accurately, so we thought we need to start right at the beginning, we started by reclassifying the human human skin damage and camp denmark came up with this index and that gave us the base to say the classification of human skin, we can digitalise the system. skin, we can digitalise the s stem. ,, . , ., skin, we can digitalise the s stem, ,, ., , ., system. shall be given to go? shall i system. shall be given to go? shall i give — system. shall be given to go? shall i give it _ system. shall be given to go? shall i give it a _ system. shall be given to go? shall i give it a try? _ system. shall be given to go? shall i give it a try? that's - shall i give it a try? that's me taking _ shall i give it a try? that's me taking myself - shall i give it a try? that's me taking myself the, - shall i give it a try? that's| me taking myself the, and shall i give it a try? that's - me taking myself the, and can you tell me what does this information here say? it has identified five different types of undertone which is very different to what the beauty industry has at the moment,

basically it is saying that you have quite a large percentage of yellow and green in your skin which is the determining factor in olive skins. the web-based _ factor in olive skins. the web-based tool - factor in olive skins. the web-based tool is - factor in olive skins. the web—based tool is powered by ai which required a scientist from the university of leeds to analyse thousands of images of skin. some photos were captured in a very precise colour measurement camera booth, while others were snapped on phones, laptops or regular cameras, but it was streamlining the quality of these images that proved challenging. of these images that proved challenging-— challenging. when we use a smart phone _ challenging. when we use a smart phone to _ challenging. when we use a smart phone to picture - challenging. when we use a - smart phone to picture someone, it gets read green and looming on every pixel, actually converting camera values into something scientifically meaningful is very difficult, so we used simple machine learning algorithms, but to do that we need to have lots of examples of images of people

and then dad through skin colour, which we measure in the laboratory, and based on those two sets of data we can learn relationships between the two. what we do make your key findings in the process of creating the index? the main wa in creating the index? the main way in which _ creating the index? the main way in which people's - creating the index? the main way in which people's skin i way in which people's skin colour varies is in terms of you and lightness, but we actually analyse quite a lot of people who had very dark skin in our process. we didn't find anybody with a blue undertone, if you like, so we tend to think that is probably a meth. the web—based tool and the index provide and the index provide a framework for detecting up to 10,000 different skin undertones. if you can basically specify every single person's skin colour uniquely, using the app and this index, then you actually have the potential in the future to match, for example, cosmetic foundation to an individual�*s skin colour.

and an industry where there is a lot of wastage, partly because people are buying the wrong products, further personalisation could be a good idea. we are hoping other people can come in, build on that knowledge to allow the building industry and other industries to really thrive so that we can actually notjust to really thrive so that we can actually not just talk about inclusivity in skin tone but we can also make sure that consumers are being catered for properly. scotland. there's no better place to enjoy nature. going for a walk and getting outdoors is so good for you, notjust outdoors is so good for you, not just to stretch the legs but also for your mental health as well. but sometimes the route you want to go on just isn't

on the map. there's hope that's going to change and that's where these guys come in. this group are from ramblers scotland, a charity who are passionate about walking. scotland has really good access rights, so you can walk more or less whatever you wish, as long as you are responsible about it. but it lacks a complete map of its path network. so the charity has been creating a digital map of its own. it brings together all known existing paths using data from ordinance survey and information from openstreetmap and local authorities. one of the surprising things about scotland as it is actually harder to find places to walk than you might imagine. we all all this green space around us but if you pick a paper map you might really struggle to find a path you want to walk. so one of the things we are trying to do

with the scottish paths map is to actually make those places easier to find her everybody wherever they live. how many paths do you think are out there for people to discover that aren't on the map? we have discovered something like 20,000 new paths in the short time we have been running the project already. i think probably we could easily double the number of paths that people have to walk in scotland when they look at this map, compared to many traditional maps. we have hoovered up all the open source data we get from partners but now we have 300 plus fabulous volunteers to discover more paths but also to record information about all the paths that we discover. the only way it is ever going to work if we have the support of people who love the outdoors, who love walking, who love maps, who love technology. the tech is powered by ezra uk. the topographical software uses powerful mapping and spatial analytics technology. it allows the team to create and manage the location information and it

is all done on your phone. digital mapping is really the way forward, isn't it? yeah, it means we can change things quickly and we can make it accessible for everyone, and it is interactive and it is interactive and we can change things on the fly, we can add things and so it is much more responsive and adaptable then you are updating stuff like paper maps. can you show me how it all works? you bring the map where you are, you find the map and you tap on the path and tap on open survey and it takes you through and then we can fill in as much oras we can fill in as much or as little as possible, a lot of the questions are not mandatory so if volunteers are unsure about something they can skip it, because we don't want to put them off, saying "i don't know the question so i won't do at all." volunteers have so far added over 9000 new paths to the interactive map. from as far north as the shetland islands to the borders

region in the south. i think the project is really important for our paths in scotland, it is a chance to support and to maintain that right to roam. but it also makes these paths more accessible to a wider variety of people, it means everyone can get out there. and we are on a nice path here, is this a path here, is this a path you have been on before? it's not, and it is not one thatis it's not, and it is not one that is on the map yet. so today we are ticking another one off the list as we go. it's notjust the co—ordinates but the data about the roots ——routes and information the walkers might find useful that is recorded, like how steep hills are, is it stoney, and even if there are angry landowners nearby. ramblers map shows the status of parts in different colours and volunteers use it to check what needs surveying. purple shows new path yet to be audited like the one we are standing on, and the green shows a completed path. just looking at the map you can see the majority of the 40,000 miles of paths still need

to be audited, but if more volunteers come out and enjoy notjust the walks but the technology too, the team will only get closer to achieving their aim. now, earlier in the programme we met back up with gav from the slomo guys to film a rocket engine test at 80x slow motion — that's 2000 frames per second. and here's how we got on. we are in a nice, flat part of texas. seems like a sensible place to do a rocket test. and as you walk along you start to get hints that there is something going on here. lots of compressed nitrogen in canisters. when you get to this shared, there is a massive canister of something there. some more serious and complicated looking pipes, some dials. you start to get the impression that the engine must be quite close by now, and then oh, actually, this is actually the engine that we have been walking past. they have

attached it to a building. so this is not going to know anywhere. and what is interesting is how we have to film this test. we have to put our cameras inside these protect their boxes, for obvious reasons. and then a whole hour before they run the test, we need to clear out of here, which means we have to run a really long remote control line for our cameras all the way around to that remote viewing area they are. we did bring the really long wire, didn't we? the camera is locked down and the remote control line is set. and with us having retreated to a safe distance... it is time. in three. _ distance... it is time. in three. two. _ distance... it is time. t�*t three, two, one.

engine roars you can feel the rumbling! laughs . that went right through me. wow! that was so loud and so bright, my eyes couldn't, it's like looking at the sun. wow! and finally, it's time to see whether we caught the shot that everyone wants to see. what were the risks?— everyone wants to see. what were the risks? what were the risks? the _ were the risks? what were the risks? the power— were the risks? what were the risks? the power could - were the risks? what were the risks? the power could have i risks? the power could have come out, the camera could have melted, an asteroid could have come straight down. t melted, an asteroid could have come straight down.— come straight down. i think that didn't _ come straight down. i think that didn't happen. - come straight down. i think that didn't happen. all- come straight down. i thinkl that didn't happen. all right. so we seem to have... oh! ok.

immediately! — so we seem to have... oh! ok. immediately! oh, _ so we seem to have... oh! ok. immediately! oh, wow. - so we seem to have... oh! ok. immediately! oh, wow. it's - so we seem to have... oh! ok. | immediately! oh, wow. it'sjust immediately! oh, wow. it's 'ust itnitint immediately! oh, wow. it's 'ust igniting the�* immediately! oh, wow. it's 'ust igniting the air. i immediately! oh, wow. it's 'ust igniting the air. look * immediately! oh, wow. it's 'ust igniting the air. look at i immediately! oh, wow. it's 'ust igniting the air. look at the i igniting the air. look at the shock waves. _ igniting the air. look at the shock waves. oh _ igniting the air. look at the shock waves. oh my - igniting the air. look at the shock waves. oh my gosh, | igniting the air. look at the - shock waves. oh my gosh, this is kind of— shock waves. oh my gosh, this is kind of pulsing. _ shock waves. oh my gosh, this is kind of pulsing. that - shock waves. oh my gosh, this is kind of pulsing. that is - is kind of pulsing. that is incredible. _ is kind of pulsing. that is incredible. that - is kind of pulsing. that is incredible. that is - is kind of pulsing. that is incredible. that is so - is kind of pulsing. that is. incredible. that is so cool. is kind of pulsing. that is - incredible. that is so cool. so that smoke is coming out at quite a speed. that smoke is coming out at quite a speed-— that smoke is coming out at quite a speed. look how dark i made this _ quite a speed. look how dark i made this image _ quite a speed. look how dark i made this image and - quite a speed. look how dark i made this image and it - quite a speed. look how dark i made this image and it is - quite a speed. look how dark i made this image and it is still| made this image and it is still very bright. but we are seeing detail, we are seeing information right around the end of the booster there. find end of the booster there. and that is it for _ end of the booster there. and that is it for this _ end of the booster there. and that is it for this week, i will leave you with beauty shots. and if you are worried about the duck, he was found 500 feet away and returned to

his natural habitat uncorked. ——uncooked. hello there. the month of march has been a bit of a roller coaster, hasn't it? and friday was no exception. look at these contrasting weather conditions — a beautiful afternoon in scarborough, north yorkshire, pleasantly warm as well. different story in wiltshire. in fact, there was just shy of an inch of rain by some torrential, and at times thundery, downpours that moved it through the country. we have actually seen quite an unsettled month for many, some areas seeing double the amount of rainfall, and the month is not out with more wet weather to come before we move into april. now, as for the start of the weekend, we are going to see further showers, not quite as many as friday, but this little weather front will enhance the showers from time to time.

it's going to be a mild start to the day. sunny spells and a few isolated showers during the morning, become a little bit more widespread into the afternoon. but there will be some drier, brighter interludes and favoured spots for that is where we had the wettest of the weather, actually, on friday. so across southern and south west england, along with wales, 13—14 celsius, a line of showers from that front across east anglia, northern england and into northern ireland. a little bit more cloud, but some sunshine into northern scotland, but noticeably cooler as that northerly wind starts to kick in, 5—9 celsius here. now, it looks likely that we are going to see some wetter weather, though, from saturday into sunday with this area of low pressure bringing some rain once again into the south—west. and so that brings a bit of a contrast first thing on sunday morning, milder air sitting down to the south—west, but eventually, as that rain clears, the cooler northerly flow starts to push further south across the country. so a grey, potentially wet

start across the south first thing on sunday morning, slowly easing away to brighter, sunnier skies, a few wintry showers in the far north of scotland, sitting in the cooler air with around 4—6 celsius. further south, it will be noticeably cooler, but not particularly biting with it. now, it looks likely that that cooler trend stays on monday with plenty of sunshine before more rain arrives for tuesday. and just before i say goodbye, don't forget, as we move into the early hours of sunday morning, it's the start of british summertime. we all lose an hours' sleep, but we gain more daylight. take care.

if you like, so we tend to think that is probably a meth.

welcome to bbc news. our top stories: gwyneth paltrow takes the stand in a trial where she's accused of causing a skiing accident which left a man with brain damage and broken ribs. i was skiing, and looking downhill as you do, and i was skied directly into by mr sanderson. biden and trudeau talk tough, as the us and canada pledge to stand together against authoritarian regimes. king charles' first state visit to france is postponed, as growing unrest over president macron's pension reforms grips the country. a russian child's drawing against the war in ukraine sparks a police investigation and tears a family apart. don't look up!

an asteroid large enough to destroy a city will pass