pallab ghosh, bbc news, washington. jane: i wonder what they will find.urse, you can find all of that story and the rest of the news on our website. i amane o'brien. thanks for watching "bbc world news america." have a great weekend. >> with the bbc news app, our vertical videos are designed to work around yo lifestyle, so you can swipe your way through aythe news of the day and up-to-date with the latest headnes you can trust. download now from selected app stores. >> funding of this presentation is made possible by the freeman foundation, and kovler foundation, pursuing solutions for erica's neglected needs. >> what are you doing? >> possibilities. your day is filled with them. >> tv, play "downton abbey." >> and pbs helps everyoneov disc theirs. anytime, anywhere. pbs. we are with you for life. >> "bbc world news" was presented by kcet, los angeles. captioning sponsored by newshour productions, llc >> woodruff: good evening. i'm judy woodruff. on the newshour tonight: >> i didn't need to do this.ra but i'er do it much faster. >> woodruff: president tru

here's our science correspondent, pallab ghosh. they are immune to a lethal lung disease. the animals have been created from fertilised eggs, surgically removed from a pig. around 20 per annum and a more flushed out. the plan is to develop farm animals for subsistence farmers in africa, that are resistant to a range of diseases. engineering disease resistance in the animals will have a huge impact in a farming community in africa, where people have much smaller population sizes and the death of one or two animals is disproportionately catastrophic for that community. so how does it work? the virus latches onto a specific part of the pigs sells. gene editing is used to cut out the section of dna that is responsible for making that part of the cell. the virus now has nothing to stick on to, so the animals are immune. these pigs are likely to be among the first in a new generation gene edited farm animals, and the technology can be used for more than just disease resistance. groups elsewhere are trying to create livestock that are lar

whether asteroids brought water and the building blocks of life to earth. 0ur science correspondent pallab ghoshy. not a star button asteroid. these pictures we re star button asteroid. these pictures were taken by the japanese spacecraft. engineers at mission control into tokyo are guiding it to the surface. it will collect rocks and bring them back to earth. the asteroid is a less than one kilometre across and is relatively close to earth. the spacecraft has been circling it since last summer and has dropped a land and to rovers onto the surface. it will soon touch the asteroid, via a pellet and then hoovered them up. and later this year, the space craft will fire a missile at it. this will create a large crater and reveal what lies underneath the asteroid's surface. the sample collector is really a heavy duty hoover. here in steve na g e, heavy duty hoover. here in stevenage, engineers are developing a sample collector for future european mission is to an asteroid. it is important to bring material back because we can do in—depth analysis using instruments on the earth. we can use instruments

our scienceal correspondentb ghosh has the details. pallabs one of the biggest discoveries in the history of science, the detection of gravitational waves caused by two black holes colliding in the distant galaxy. >> we had detected gravitational waves. we did it. [applause] pallab: that was three years ago. now a pair of fos-kilometer-long instrume in the u.s. that made the discoveries are to be given an upgrade. they are already the most sensitive instruments in the world. inside are lasers and mirrors that measure t tiny shifts ious wavesthese myst from outer space. gravitational waves are ripples that go across the universe when the gravity at a certain point in space suddenly change triggered by events like distant stars exploding. over the past three years, the instruments have detected the collision of 10 black holes.th he upgrade, scientists will be able to detect many more, maybe three each day. hardest to detect are the collision of giant suns, called neutron stars. just one spotted so far. the new machine will b to detect 13 each m

pallab ghosh, bbc news, washington.lter to a variety of wildlife living there. the monuments will now receive funding to ensure the archaeological sites can carry on protecting the fragile habitats that have grown up there. 0ur reporter, john maguire, has been to find out more. as first happened here thousands of years ago, the hill is being cleared by hand, some of the wood is burned, some of it reused to. some people might wonder, it seems order to be cutting trees down, what is the point of it? this scrub is growing on quite significant remains, as you can see. we are going on the steep slopes of the ramparts here. and if you look at some of the older scrubs down there, you'll see it's quite bare underneath. and that's a bit of a problem as far as archaeology is concerned because it's lots of loose soil like this and that washes down, causes erosion problems, that sort of thing. the latest research has identified more than 4000 hillfort across the british isles, most built in the iron age and home to hundreds of peop

pallab ghosh, bbc news, washington.e of this machine, which i am going to ask you to show us and tell us more about how it works. thank you for letting me talk this morning. i have brought a miniature version of one of the mirrors in the observatories. it really is all done with mirrors. the real mirrors we use our 40 kilograms, so you can imagine, quite large. but we do many of our tests on smaller samples, samples like this one. you can see a beautiful pink colour on the front of this piece of glass, which is a special coating. we, unlike normal telescopes, don't catch the light with mirrors, instead what we use is these mirrors as markers in space and we measure the distance between them and how that distance is changed by gravitational signals coming in from far out in space, from colliding stars or stars exploding. stars exploding, colliding stars, these are some of the examples measuring the distance between these mirrors can tell you about events happening in space? that is correct. as a violent event happen, did

pallab ghosh, bbc, edinburgh.to turn it into one of the world's longest underground cycle routes. tomos morgan has been to take a look inside. hidden away under the mist and green hills is a highway. an old rail track that once connected the coal towns of the valleys and the ports of south wales. and after 60 years of laying dormant, the rhondda tunnel could get a new lease of life as a cycle path. but at the moment, this is the only way down. it is a 60—foot abseil down into the heart of the tunnel. hello? hello. nice to meet you. i'm hugh. steve mackey has grown up with this lying on his doorstep. i started coming in here when i was ten and i would sit there marvelling at the work and the workmanship and the craftsmanship of the tunnel. opened in 1890, for almost 80 years, trains ferried coal and also passengers through the hills to the port of swansea. after a temporary closure in the late ‘60s on safety grounds, it never reopened. its rebirth as a cycling footpath has become the rhondda tunnel society's full—t

here's our science correspondent, pallab ghosh. just a few hours old.lung disease. the animals have been created from fertilised eggs surgically removed from a take. around 20 per animal are flushed out. the plan is to develop farm animals for subsistence farmers in africa that are resistant to a range of diseases. engineering disease resistance and the animals will have a huge impact on a farming community in africa were that are much smaller proportion sizes and the death of one or two animals is disproportionately catastrophic. so how does it work? the virus latches ona how does it work? the virus latches on a specific part of the pig's cells. gene editing is used to cut out the section of the dna responsible for making that part of the cell. the virus now has nothing to stick onto so the animals are immune. these pigs are likely to be among the first in the new generation of gene edited farm animals. the technology can be used for more than just disease resistance. groups are trying to create livestock that are larger, leaner and more productive. th

association for the advancement of science meeting in washington, from where our science correspondent, pallab ghoshoveries in the history of science, the detection of the gravitational waves caused by two black holes colliding ina distant caused by two black holes colliding in a distant galaxy. we have detected gravitational waves! we did it. that was three years ago. now, four kilometre long instruments that made the discovery are to be given an upgrade. they are already the most sensitive instrument in the world. inside are laces and mirrors that measure the tiny shifts caused by these mysterious waves from outer space. we are just on the cusp of our understanding. those first signals coming in, the vibrations of space, time, besides we are picking up space, time, besides we are picking up from the collision of these cosmic objects arejust up from the collision of these cosmic objects are just the first information from back holes. have instrument is get more and more sensitive, we will hear more and more clearly the signals coming in with exquisite precision, stating how space time is being dist

well, the new plans have been announced in washington, from where our science correspondent pallab ghoshgest discoveries in the history of science. the detection of the gravitational waves, caused by two black holes colliding in a distant galaxy. we have detected gravitational waves. we did it. that was three years ago. now, the pairof4 that was three years ago. now, the pair of 4 kilometre long instruments that made the discoveries are to be given an upgrade. they are already the most sensitive instruments in the most sensitive instruments in the world. inside, are lasers and mirrors that measure the tiny shifts caused by these mysterious waves from outer space. gravitational waves a re from outer space. gravitational waves are ripples that are sent across the universe, when the gravity at a certain point in space suddenly changes. triggered by huge events like distant stars exploding. 0ver events like distant stars exploding. over the past three years the instruments have detected the collision of 10 black holes, scientists will be able to detect many more, maybe three each day. harder

pallab ghosh, bbc news, washington.atures were more like march or april, beautiful out there. every day is just as —— today is just as one. there is a load of pictures i want to show you. we couldn‘t decide which ones to show, so we thought we would show them all. the mornings are really chilly and misty, with a touch of frost. by the time we get to the afternoon, it is stunning. you look at that picture in the morning and you think, it‘s going to be a cold, miserable sort of day, but very much the opposite, in fact. and we are seeing a big range in temperatures. and that is a sign that we are heading into spring. in our climate, it happens a little less frequently than on the continent, where the air is very dry. we are talking about a diurnal range, meaning the temperature in the morning is low and we get a very big rise, the temperature shooting up by as much as 15 degrees in a few hours. you get the misty and foggy frosty mornings, and then within three or four hours, it looks like it could be almost august. on the

well, the new plans have been announced in washington, from where our science correspondent pallab ghoshack holes colliding in a distant galaxy. we have detected gravitational waves. we did it. that was three years ago. now, the pair of four kilometre long instruments in the us that made the discoveries are to be given an upgrade. they are already the most sensitive instruments in the world. inside are lasers and mirrors that measure the tiny shifts caused by these mysterious waves from outer space. gravitational waves are ripples that are sent across the universe when the gravity at a certain point in space suddenly changes. triggered by huge events, like distant stars exploding. over the past three years the instruments have detected the collision of ten black holes. with the upgrade, scientists will be able to detect many more, maybe three each day. harder to detect are the collision of giant suns that have collapsed, called neutron stars. just one spotted so far. the new machine will be able to detect 13 each month. and astronomers should be able to see much deeper into the universe,

our science correspondent pallab ghosh reports.em back to earth. the asteroid is less a kilometre across and relatively close to the earth. the spacecraft has been circling it since last summer and has already dropped a land, and two rovers onto the surface. it will soon touch the asteroid and then hoovered them up. and later this year, the spacecraft will fire a missile at it. this will create a large crater and reveal what lies underneath the asteroid‘s surface. the sample collector is really a heavy duty hoover. here in stevenage, engineers are developing a sample collector forfuture missions. it is important to bring them back as we can do in—depth analysis. we can use instruments the size of this room, rather than a miniature instrument. asteroids are thought to be the basic building blocks from which planets are made. samples collected will reveal whether the brought water and the key components needed for life to earth. other bits of asteroids fell to earth, the are too burnt from entry into the earth‘s atmosphere to answer

pallab ghosh reports. like a diamond in the sky, not a star but an asteroid.re guiding it the surface. it will collect rocks and bring them back to earth. the asteroid is less a kilometre across and relatively close to the earth. the spacecraft has been circling it since last summer and has already dropped a land, and to reverse onto the surface. it will soon touch the asteroid and then hoovered them up. and later this year, the spacecraft will fire a missile at it. this will create a large crater and reveal what lies underneath the asteroid's surface. the sample collector is really a heavy duty hoover. here in steve na g e, really a heavy duty hoover. here in stevenage, engineers are developing a sample collector for future missions. it is important to bring them back as we can do in—depth analysis. we can use instruments the size of this room, rather than a miniature instrument. asteroids are thought to be the basic building blocks from which planets are made. samples blocks from which planets are made. sa m ples collected blocks from which planets are made.