treated to hitting of the highest order. it took a tie—break to decide the first set. sometimes i'd within your opponent wins points, sometimes just brute force. —— outwitting. while the quality of the tennis was enough to make the head spin halep called for the doctor, suffering from dizziness. she started finding the lines and before long she had a set point. simona halep, known for herfighting spirit, set point. simona halep, known for her fighting spirit, levelling the match. but just when her fighting spirit, levelling the match. butjust when she thought she had the advantage, her opponent's on battling attitude came to the fore, wozniacki setting up championship point. with their first grand slam title and world number one ranking at stake it came down to this. the new world number one becomes the first player from denmark to win one of the big four singles titles in the open era. you can see what it means to. ben stokes has been snapped up this morning for nearly £11; millions, in the auction of players, for the indian premier league. he's been bought by the rajasthan royals. that's despite facing a charge for affray, after an incident,

outside a nightclub in bristol. the all—rounder was the most valuable player of the twenty20 tournament last year. stokes is the joint most expensive of the overseas players. here are the other english players who've been bought so far. chris woakes has fetched £820,000 from royal challengers bangalore. wicketkeeperjos buttlerjoins stokes at rajasthan royals forjust under £490,000. moeen ali, who has had a poor winter for england, will be with fellow all—rounder woa kes at royal challengers bangalore. he cost them £187,000. and jason roy, who hit the highest ever odi score for england earlier this month, went to delhi daredevils for £165,000. test captainjoe root is one who so far remains unsold. there are 12 fa cup fourth round ties taking place today. peterborough host leicester in the early kick—off. they are warming up on the pitch.

southampton against watford is an all—premier league tie kicking off at three o'clock, as is the late kick—off for liverpool at home to west brom. and watch out for giantkilling when newport county of league two take on tottenham. newport very nearly went out, of the league last season, but are now pushing for a play—off place and knocked out leeds united in the last round. beating leeds was my highlight because i could enjoy that game and it was due to our hard work of getting in that position. and what happened at the end of last season was obviously more important for the football club. you only have to see the struggles hartlepool are going through and it could quite easily have been us. we're fortunate. we're working hard to keep improving and that's what we always do here. rory mcilroy went into the third round of the the dubai desert

classic with five birdies in his last seven holes. he started the day on 15 under. an eagle took to 16 under par. andy sullivan is also 16 under par. andy sullivan is also 16 under after shooting 63. it is goalless in the early stages between peter browne leicester. —— peterborough and leicester. now on bbc news, click. this week: preserving people during life and after death. the digital legacy that you leave behind. and lots of freezers. ah, the streets of san francisco! mecca for technology

innovators and aficionados. a destination where the cult of geek reigns supreme. everyone's got that billion—dollar idea here and everyone wants to save the world. the ethos of nothing's impossible runs in the veins and twitter feeds of every twentysomething zuckerberg wannabe. now silicon valley is taking on life's biggest challenge, death. dave lee has been looking at how silicon valley is trying to help us all live longer. this will be my last mealfor 36 hours. like a growing number of people in silicon valley, i'm about to try fasting, something some here believe could contribute to extending our lifespan. my advice to you, just sleep in really late so you don't have to deal with it! kristen brown is a biotechnology journalist.

she tells me living longer is becoming something of an obsession for many techies. we tend to see people notjust thinking of their body as a machine but talking about it metaphorically as a machine. are they actually making any progress? it's growing so quickly right now, we understand so much more this year than we did last year even but the other thing about science is the more questions you answer, the more questions there are. the following morning my first stop after i skipped breakfast was geoffrey woo. he's chief executive of a firm called hvmn. it promotes fasting as a way to boost productivity and increase our healthspan, that is the number of years you are fully able before the troubles of old—age. geoffrey promotes the 36—hour faster that i'm on and his company sells products they claim will boost your body's reaction to fasting. so when you're extending beyond a 24—hour fast, you're dipping into a metabolic state called ketosis, which converts your stored body fat into a really efficient source

of energy called ketone bodies. as one gets better at being in ketosis, cognitive clarity ends up being a productivity boost. to test it we measured the ketone level in my body with a simple blood test. my ketone levels were low, as could be expected, but next i drank one of hvmn's ketone—producing products. you can expect to see within 15 minutes equivalent to five to seven days worth of fasting level of ketones in your system. the science behind what benefits can be had isn't exactly watertight. one study suggests one of hvmn's other products may not have any greater effect than a cup of coffee. the moment of truth for me came around 30 minutes later. wow. 2.2. 0k. eventually equivalent to having fasted for three or four days in 30 minutes. the obsession with reduced the nation and longevity here has

even been satirised on hbo's silicon valley. —— rejuvenation. it's my transfusion associate. like all great comedy, it's funny because it's true. one incredible idea being tested here can be traced back to this man, paul bert. in the mid—1800s, he claimed if you took an old mouse and literally stitched it together with a young mouse, the young mouse would become more agile, have a better memory and heal more quickly once it had the young blood flowing through its veins. of course we can't start stitching humans together, but there is a start—up that thinks it can do than expected thing. alkahest is a california based start—up that believes weekly injections of blood plasma from young people could fight the onest of alzheimer's. we treated these patients once a week for four weeks with one unit of plasma, and we found the treatment was safe and very importantly, although it was a short study to see learning and memory

improvements, but it was good enough to see some near—term improvements. the team said it found those treated were more capable of basic daily tasks and more aware of their surroundings. encouraging but farfrom conclusive. so far it's only been proven that this technique works with mice, but it's hoped that extensive human studies might help this team unlock the secret to easily rejuvenating humans. ultimately we might be able to identify agents that can be administered orally. to gather this database set up a partnership to get the blood plasma from grifols, a major pharmaceutical firm based in spain. people are being paid to give up their young blood. well, that's a fascinating ethical question. i actually think that there is a large pool of donors currently, which is increasing, and i think there's an increasing

recognition of how valuable plasma proteins are. to get some answers on whether or not fantastical ideas could actually work, i went to visit one of the world's foremost experts on ageing. fasting elicits a response in your body that triggers a protection against many of the diseases associated with age. so there's growing realisation that multiple forms of fasting might actually be beneficial in the long—term. one of them or perhaps outrageous ideas is that you can transfer young blood into an older person and that will rejuvenate and slow the ageing process, is that true? first let's talk about the science in mice. it is actually amazing work. the science is really strong. now, taking this and bringing it to humans is a completely different story, so the idea for example that one would take human plasma or human plasma product and give it to humans to prevent ageing is, in my opinion, lunacy.

finally, my 36 hours were up. i'm not sure it's worth it, the lows i had last night and this morning were awful and to do that regularly i think might lead to a longer life but it certainly wouldn't be a happier one. what could be really interesting, though, is if these companies can recreate the positive effects of fasting without the hard work of having to go without food for such a long period of time. but for now, i think i'm going to choose breakfast. that was dave lee. and while the quest for a longer life might take a little while longer, technology has been looking at other ways to help us live on through avatars. the university of southern california has been creating virtual versions of holocaust survivors for the past few years, preserving their memories and experiences for future generations.

survivors are interviewed at length inside a special light stage used by hollywood to capture them in 360 degrees. using voice recognition and machine learning, anyone can interact with these digital holograms at special exhibit sites. did any of your family members survive? one aunt, that was my dad's sister that survived, so from the immediate extended family there were three of us that survived. i went along for a scan myself. now, the rig admittedly looks rather make sure with lots of low—cost cameras capturing me from different angles. by scanning some extreme facial expressions, most mouse movements and emotions can also be simulated by merging between them. right now we can capture ourselves as we are today, perhaps our people and our lives are going to get older and the next

generation won't see them any more. can i capture grandma and grandpa? can i capture enough of what they look like, how they move, even what they think to a certain extent, can we combine that with artificial intelligence where it would be possible to have an interaction with a person who is not alive any more? here in the uk the forever project is also working on a similar idea at the national holocaust centre and museum, virtually preserving survivor experiences. but a digital legacy isn'tjust for people like these. most of us will leave a will regarding our possessions or instructions for our funeral arrangements, but now emphasis is also being placed on our digital footprint too. i spoke to facebook‘s head of global policy, monika bickert, about our postmortem account options. this is such an incredibly sensitive subject that for facebook i would imagine is an impossible task to get right. it's certainly a very difficult area for us.

losing people is so hard and at facebook we want to make sure that we are respecting that person's life and respecting the choices that person made, but we also want to make sure we're making this process as easy as possible for the family members that are going through it and actually it's sometimes hard for us to satisfy both of those. so i'd imagine a lot of people do not tell you, facebook, what they want to happen to their accounts after their death, so how do you know what to do? that's right, a lot of people don't. i want to be clear that there is a way to tell facebook what you would like to happen to your account after you pass away, we call it our legacy contact. you can actually designate someone who can look after your account after you're gone. basically this gives the person, you can choose what authority you want the person to have, but this gives the person the choice to, say, change your profile photo or add friends or put a post

at the top of your profile. they do not become you, they cannot control every feature of the account, they can take some actions, they can choose to delete the account, but they do not have the ultimate control to look at your private messages. family and friends have particular feelings about what happens to someone's memories when they're gone, they don't always agree. how do you even begin to settle those disputes? we will delete the profile if one person asks for it. now, having gone through this myself, i lost my husband a little more than a year ago, and my experience was that it was very powerful for me and very comforting for me to be able to look at things that he had written, to see photos that he had posted. it made me feel like i could still connect with him and that he still was a very active presence in my life.

i wonder whether you have any advice to people watching this on how to go forward if they experience something similar? i think the important thing is have the conversations now and talk about how you would want to treat your digital legacy, including what do you want to happen to your online presence, your facebook account, your other accounts, and what is your plan for making sure that your estate, all the practical things that we don't like to think about very much in our daily lives are taken care of so your loved ones don't have to go through that. welcome to the week in tech. it was the week that the head of microsoft, satya nadella, said the world is running out of computing capacity and that quantum is the only way forward. a new degree in flying car engineering was announced at an e—learning school in silicon valley. and facebook invented a new unit of time called a flick. it's designed to help video editors and people working

in visual effects. the new unit lasts longer than a nanosecond but is shorter than a microsecond. and sky decided to take on the likes of amazon and netflix, launching its new now tv stick. it's also announced it's goodbye to the old sky satellite dishes as all its services go online from 2019. also this week, general motors became the first self—driving car manufacturer to be sued over an accident. its chevrolet bolt a motorcyclist back in december. meanwhile, tesla had its own autopilot problems when a model s ploughed into a fire truck. the race to put the first privately funded spacecraft on the moon is over, and not with a rocket launch but a tweet and a statement. the google lunar x prize offered a $20 million prize fund for the first team to land on the moon by march. finally, a robot working in a supermarket has been fired byjust one week for scaring customers await. fabio was an experiment to see if robots would interact well

with shoppers, but it turns out it's instructions such as the beer is in the alcohol aisle infuriated people rather than helping them. the job market's tough out there! unexpected item in bagging area... oh, a familiar phrase, but, as we've seen this week, one that we may not need to hear much longer. amazon go's cashier—less seattle store finally launched on monday. you can check in with your phone, cameras and sensors will track what you pick up and your amazon account will be instantly charged. they aren't the only big players trying to cut supermarket queues, though. big companies like imb and accenture have been trying to crack the cashier—less supermarket model for some time. well, it's time for a rather unconventional shopping experience. the first thing i'm going

to do is get my bag out. i visited this north london convenience store, where ibm have been putting their prototype instant check—out to the test. because when it comes to actually checking out, the rf id tags that sit on all the products will be instantly scanned in one go, you can just put everything in here straightaway, although it does sort of feel wrong. and something sweet. so i have everything i need in my shopping bag, but i can't leave just yet. in fact, this is the fun bit. it's time for the instant check out. i pop down my bag full of items and immediately what's in that bag seamlessly comes up on the screen. if you're concerned this could make things too easy for shoplifters, though, because obviously it does look like you've legitimately paid, then fear not. there is something to overcome that. rf id readers can be placed right by the doors, so if anybody does try to leave with something

that hasn't been scanned, the alarm will go off. for customers who are happy to share their habits and behaviour, artificial intelligence will come into play to combine that information with data on their surroundings. weather and traffic, for a convenience store like this, will drastically change what people will come in and buy, how many people come in and when. being able to use all of those mass volumes of data, do predictable analytics, all of that means we will be able to tell the retailer what to keep in stock and when. and that is a real driver behind all this, to understand our shopping habits from the moment we enter a shop until we leave. accenture has kitted out this milan store, which they've dubbed the supermarket of the future. it features e ink display price tags and a lot of screens. hidden behind them are kinect depth—sensing cameras, collecting data on customers‘ movements and interactions with products.

the designers of the space hope that as well as providing insight to the retailer, the data collection will better the overall shopping experience. a lot of information available regarding food does not appear anywhere when you get into the supermarket, so all of this data availability does not show up, so we wanted to give that kind of information back to the customer. but while most of us are still actually engaging with humans, or the self—service aisle, it seems the cashier—less shop could be coming to a place near you fairly soon. that was lara. now, we've been looking at various ways to try and extend human life, possibly indefinitely, but the researchers can't do it yet and so, until they can, there are those who are offering to put your life on pause. marc cieslak has been to arizona to meet the self—preservation society. death and taxes, as the saying goes,

are the two things none of us can avoid. what about if there was a workaround for death, some way of extending our physical existence on this planet? alcor was founded in 1972 in order to preserve people from the point of death, freeze them and then when technology is sufficiently advanced revive them in the future. a process it calls cryonics. this is an interesting infographic on the history of cryonics, which starts actually as far back as 1773, when benjamin franklin thought about the future of america and speculated that maybe he could be pickled in a vat of madeira with his best friends to see how the country came out. what goes on in this space here? obviously this simulates a procedure you would normally perform when somebody dies? exactly. we have to wait for the legal death to be declared.

at that point we move the patient from the bed to the ice bath. we're gonna cover them with ice. and at the same time, even though they've been called legally dead, we're gonna restart all kinds of things. we're gonna use a respirator to recover breathing, we will use this mechanical cpr device and the reason we're doing that is that we want to administer a series of different medications to protect the cells. so this is even though the patient themselves is dead at this point? right. it's very much like when you donate an organ, even though the person has been declared dead that doesn't mean all of the cells are suddenly dead. patients are effectively pumped full of antifreeze to protect their tissue from the freezing process which comes later. it costs up to $200,000 to preserve a full body and $60,000 if somebody just wants their head preserved. so this is our operating room. the patient will be put on this special operating table. it's basically designed to shape the patient for long—term storage. we don't want someone at a very low temperature with their arm sticking out. it's very hard to fit into the capsule.

this here as well, this is just for heads? so usually we'll begin on the operating table over there and then we do a neuro separation, a few vertebrae down, and then place the patient‘s cephalon, which is the brain plus the skull, upside down in the neuro ring. essentially the same process, we're going to remove the blood and fluids from the brain and cryo protect them against ice formation. why would people want their head separated from their body? i'm not going to come backjust as a head, i'm going to get a new body and my view is that, unless i die early in an accident, then maybe i'm 95, 100—years—old if i'm lucky, my body's going to be in lousy shape anyway and the whole thing will have to be regenerated. why go to the extra cost of storing my whole body, which is ten times the volume ofjust my head? the corridors here are lined with photos of people who are already frozen in alcor‘s storage facility. this is the patient care base, where we currently store all of our patients. currently 152. these are all of your patients?

yes, all of our patients here. actually about two thirds of them are neuro patients. that means they're just heads? yeah. so about half our living members are whole body. we actually have more neuro patients here. this can actually contain four whole body patients. alcor doesn't have any legal obligation to the people stored here, as they technically donated their bodies to science. what happens if you have a power cut, for instance? well, we don't need electricity for this. these are passive vessels, they're just gigantic, very expensive thermos flasks and you don't plug your thermos flask into electricity. we just use the liquid nitrogen, which boils off at —320, to maintain that temperature. alcor says it's a non—profit making organisation and that it has 1,150 people signed up for its services, including silicon valley billionaire peter thiel. but what motivates ordinary people to shell out up to $200,000

for cryogenic preservation? back in the uk, derek watkinson has signed himself and his family up for just that via a different outfit called the cryonics institute. i imagine being on my deathbed, dying, and then immediately waking up. if it's gonna work, i'm gonna wake up straightaway, ‘cause the passage of time won't mean anything, because i will be dead. so i'll wake up immediately and hopefully i'll be able to remember things. my memory will be intact, hopefully. who i am. your whole family is going to be preserved as well? yeah. luckily my wife and daughter are for the idea and they are signed up members of the institute. but is this all too good to be true? we spoke to a neuroscientist who has serious misgivings about the basic foundations of cryonics. you really can't afford to freeze biological tissue until it's been

appropriately protected. but unless you take it down to those low temperatures for protection quite quickly, it will continue to decompose. and my problem with the cryonics dream, the wishful thinking contracts that are sold, is that they haven't resolved that conflict. there's no evidence that they can get the antifreeze into all those micro nooks and crannies into the brain and satisfactorily protect it. we put this to alcor, who provided a detailed response: so is this the ultimate insurance policy then? yeah, but i've not lost anything. a bit of money. lots of money.

that was marc and that's it from san francisco for now. don't forget, there's loads of extra stuff from us on twitter and on facebook too. thanks for watching and we'll see you soon. hello. some pretty gloomy weather across the british isles this weekend. we are under there somewhere. this is a mass of cloud working its way across is at the moment. rain this afternoon,

particularly for the south—east of england and east anglia. elsewhere the prospects should become drier. drizzly in northern england, wales and the south—west. windy for northern and western scotland. showers as well. a weather front into the continent in the evening. drier if you're heading out and about. chilly in the evening. through the small hours in piles more cloud. misty and murky across england and wales. more rain heading into scotland and northern ireland. wet for much of scotland and the north of northern ireland on sunday. further south, generally dry. a lot of cloud. a mild day. good afternoon. the director of public prosecutions, alison saunders, has said all current rape and serious sexual assault cases in england and wales are to be reviewed "as a matter of urgency" following the collapse of several recent trials because evidence was not disclosed to defence lawyers.