:00:24. > :00:27.Hello there, Newsrounders. Joe and Nel here with today's top stories.
:00:27. > :00:33.We're live. It's 5.00pm, and this is a little taste of what's coming
:00:33. > :00:36.We head to Mars for World Space Week. We head to Mars for World
:00:36. > :00:40.Space Week. And part human, part dolphin - the
:00:40. > :00:43.high-tech gadget taking the seas by storm.
:00:43. > :00:45.But first, there's a warning that one of the world's most incredible
:00:45. > :00:48.natural wonders could be disappearing. The Great Barrier
:00:48. > :00:52.Reef in Australia not only looks amazing, it's also home to more
:00:52. > :00:55.than 1,500 species of fish. But today scientists have revealed
:00:55. > :01:04.that the world's largest living reef is half the size it used to be.
:01:04. > :01:06.I've been looking into why it's such a big deal.
:01:06. > :01:09.It's beautiful peaceful scenes like this that bring thousands of
:01:09. > :01:12.visitors to the Great Barrier Reef every year. But it's not as
:01:12. > :01:15.tranquil as it looks. Although large parts of it are protected
:01:15. > :01:20.from being damaged by humans, this massive natural habitat is under
:01:20. > :01:29.attack from starfish. Scientists are worried that the reef is being
:01:29. > :01:35.eaten by the crown of thorns starfish. They have a really small
:01:35. > :01:39.mouth and no teeth, so to eat the coral, it's a bit disgusting. They
:01:39. > :01:44.have to throw up the stomach, throw it on to the surface, then turn it
:01:44. > :01:47.into a mush they can drink up. The Great Barrier Reef is the
:01:47. > :01:50.world's largest coral reef system. It's so big, it can be seen from
:01:50. > :01:53.space, but it is shrinking. It's 1,600 miles long, off Australia's
:01:53. > :01:57.north-east coast, but the amount of living coral on the reef is now
:01:57. > :02:00.only half what it was 27 years ago. Starfish eating the coral are being
:02:00. > :02:03.blamed, but there are other factors like bad storms and rising sea
:02:03. > :02:06.temperatures. The reef is a breeding ground for
:02:06. > :02:13.thousands of species of fish. Many of them are endangered, so
:02:13. > :02:19.scientist say something needs to be done to stop it being destroyed.
:02:19. > :02:24.we were to lose coral, we'd see a decline in the number and different
:02:24. > :02:28.types of sea animals that rely on the coral to live. Also, they're
:02:28. > :02:30.really important in the same face as rain forests or trees are on
:02:30. > :02:33.land for getting rid of greenhouse gases.
:02:33. > :02:37.Coral is a living thing which can regrow over time, but it can take
:02:37. > :02:40.up to 20 years to get back to full health. Scientists are warning that
:02:40. > :02:46.action must be taken, otherwise the reef could be halved again over the
:02:46. > :02:49.next ten years. In other news, hundreds of people
:02:49. > :02:53.have been helping police to look for a five-year-old girl from mid
:02:53. > :02:58.Wales. April Jones went missing last night in her home town of
:02:58. > :03:02.Machynleth. Police are appealing for anyone with any information to
:03:02. > :03:10.come forward. Meanwhile, volunteers have come from far and wide to help
:03:10. > :03:13.with the search. The community have been amazing. It's pulled the town
:03:13. > :03:17.hall together. Everybody is willing to do anything. They have come from
:03:17. > :03:21.all places to help, and we're so grateful for their help. We're
:03:21. > :03:24.hearing in the last hour a 46-year- old man has been arrested in
:03:24. > :03:26.relation to the disappearance. Police and volunteers are still
:03:26. > :03:29.searching for April. Elsewhere, the teacher arrested
:03:29. > :03:32.after running away to France with 15-year-old student Megan Stammers
:03:32. > :03:36.has agreed to come back to the UK. Jeremy Forrest appeared in a French
:03:36. > :03:39.court today, but British police want to bring him home to deal with
:03:39. > :03:47.him here. He could be back in the country by Thursday where he'll
:03:47. > :03:51.then face further court cases. Yesterday we took you on a journey
:03:51. > :03:52.to the moon, but today we're going a little bit further - all the way
:03:52. > :03:55.to Mars. That's right.
:03:55. > :03:59.In August NASA's Curiosity rover landed on its surface. It's mission
:03:59. > :04:02.- to search for evidence of life. But it's fair to say the big
:04:02. > :04:10.interest in the red planet is nothing new, as I've been finding
:04:10. > :04:14.out. Mars - the subject of films, books
:04:14. > :04:18.and music the world over # Is there life on Mars #
:04:18. > :04:23.But why are we so obsessed with it? Robert Grant is from sci-fi London.
:04:23. > :04:27.During the kind of mid '50s to mid '60s there was an enormous number
:04:27. > :04:31.of films made about Martians and Martian creatures, and Mars became
:04:31. > :04:36.the kind of place that all the bad creatures came from. Away from the
:04:36. > :04:39.sci-fi, there's a lot more to the Red Planet than alien invaders, and
:04:39. > :04:44.scientists believe it's the only planet humans could realistically
:04:45. > :04:48.live on in the future. But it's not easy to get to. We're talking about
:04:48. > :04:52.a planet that's as much as 250 million miles away, and you have to
:04:52. > :04:56.try to avoid space debris, freezing temperatures and solar flairs, so
:04:56. > :04:59.instead of sending humans we have been sending robots. Right now
:04:59. > :05:04.Curiosity is on the Red Planet's surface sending back data and
:05:04. > :05:09.pictures to earth. I met one of the scientists who built it. Why is
:05:09. > :05:13.Mars so important for us as humans to reach? It's so earth-like in so
:05:13. > :05:17.many ways. Liquid water may be flowing under the surface of Mars
:05:17. > :05:21.right now. That's really important because on earth, everywhere we
:05:21. > :05:27.find liquid water, everywhere, we find life. Curiosity's mission will
:05:27. > :05:32.last about two years, but NASA are already planning to send another
:05:32. > :05:37.robbot afterwards temperature European Space Agency want in on it
:05:37. > :05:41.as well. They're sending this Rover up in 2018. Robots can only tell us
:05:41. > :05:44.so much, and scientists know if we want to find out more we'll have to
:05:44. > :05:48.send humans. This will be the fifth robot we
:05:48. > :05:51.have sent to Mars. When are we going to send a human? It's
:05:51. > :05:55.difficult to say because it's far in the future, but we're building
:05:55. > :06:05.the rockets that could take us there. It could be as much as 50
:06:05. > :06:06.
:06:06. > :06:15.years but no-one knows. In 2010 the Mars 500 Project cured where humans
:06:15. > :06:21.lived in isolation for many days to see if they could cope. We're
:06:21. > :06:25.building bigger and better robots, so it seems our obsession with the
:06:25. > :06:28.Red Planet isn't going away. And we want to hear if you think we
:06:28. > :06:34.should be going to Mars OR focusing space projects elsewhere. Head over
:06:34. > :06:37.to the Newsround website and tell us your thoughts now.
:06:37. > :06:40.Movie news now and whenever there's a new James Bond film the details
:06:40. > :06:44.of the theme tune are always top secret. But for the new movie
:06:44. > :06:47.Skyfall things haven't gone quite to plan. We revealed yesterday that
:06:47. > :06:51.Adele had secretly recorded the track, which was supposed to be
:06:51. > :06:56.officially released on Firday. But then a rogue version was leaked
:06:56. > :07:02.online and they've had to put it out early. Here's a sneak peak.
:07:02. > :07:05.# Let the sky fall # And it crumbles
:07:05. > :07:08.# We will stand tall # I like it. I love it.
:07:08. > :07:11.Next to the nine-year-old internet sensation who's using her new found
:07:11. > :07:15.fame to help children in Africa. Martha Payne hit the headlines
:07:15. > :07:18.after her school dinner blog got a massive online following.
:07:18. > :07:20.But rather than rest on her laurels she's used her popularity to raise
:07:20. > :07:27.thousands of pounds to help starving kids in Malawi. Here's
:07:27. > :07:31.Ricky with the story. It began with some photos - earlier
:07:31. > :07:34.this year Martha Payne started to take pictures of her school dinners
:07:34. > :07:38.and put them online, giving them a rating, and the rating wasn't
:07:38. > :07:42.always great. For awhile, she was banned from taking snaps of her
:07:42. > :07:47.lunch, but with five million people visiting the site, the school had
:07:47. > :07:52.to give in and let her carry on. But some people said it wasn't fair.
:07:52. > :07:56.Someone made a comment on the board saying, "Why are you complaining?
:07:56. > :08:02.At least you're having school meals" Something they don't always
:08:02. > :08:05.have in Malawi in the south-east of Africa. So back in Argyle with her
:08:05. > :08:10.blog attracting attention around the world she realised her blog
:08:10. > :08:15.could make a difference. She asked people to donate money so it could
:08:15. > :08:20.help people in Malawi. Martha Payne and her family threw to Malawi to
:08:20. > :08:25.see how the money raised was being spent. She got quite a welcome.
:08:25. > :08:27.This building here was the temporary kitchen. For five months
:08:27. > :08:32.the community used that through Martha Payne's efforts we have
:08:32. > :08:36.built this kitchen. Juror to the 450 kids here, the blog has meant
:08:36. > :08:40.they get a bowl of porridge at the school every day. It makes a
:08:40. > :08:43.difference. Here is what she made of it all.
:08:43. > :08:49.It was nerve-racking because everyone was staring at me. It's
:08:49. > :08:53.difficult to stop old habits, and she couldn't resist taking snaps of
:08:53. > :08:56.the food on the plane she says will be on the blog soon.
:08:56. > :08:58.We can't get away without showing you this.