:00:07. > :00:10.Ayshah here, with news of how mining on the moon could
:00:11. > :00:14.Plus: The kids preparing for the biggest performance of their lives.
:00:15. > :00:21.First today, then - a spacecraft that's been chasing
:00:22. > :00:24.a comet across the galaxy for the last ten years is expected
:00:25. > :00:30.The European Space Agency probe, Rosetta, will become the first
:00:31. > :00:35.man-made object in history to travel round the 10,000 mph comet,
:00:36. > :00:49.Very soon the Rosetta spacecraft will begin to orbit this, and then
:00:50. > :00:54.spend the next months analysing what it is made from. Its mission is to
:00:55. > :00:59.find out whether the, kick start of life on planet Earth. Comets
:01:00. > :01:05.scattered across the early Earth 4.5 alien years ago, bringing water and
:01:06. > :01:10.possibly some of the ingredients for life. Scientists believe those
:01:11. > :01:15.ingredients mixed to create the chemicals from which life may have
:01:16. > :01:18.emerged. The biggest question we are trying to answer is where it did
:01:19. > :01:25.life on Earth come from. Did it start, how did life get going? Was
:01:26. > :01:29.it will ding blocks of life that were brought here? Rosetta will
:01:30. > :01:36.spend the next few months taking pictures of the,. It is up close and
:01:37. > :01:39.personal. We will be able to understand everything about the
:01:40. > :01:48.Comet, its chemical composition, whether life on it was the source of
:01:49. > :01:52.oceans on earth. In November scientists plan to land a probe to
:01:53. > :01:54.see what it is made up and whether comets hold the key to how life
:01:55. > :01:57.began on Earth. Well, sticking with space,
:01:58. > :01:59.China is considering mining Last year the Chinese became the
:02:00. > :02:04.first country in 40 years to land And now the scientists
:02:05. > :02:07.behind the project say removing a rare lunar gas called helium-3
:02:08. > :02:10.could help provide enough energy to Scientists here say it could
:02:11. > :02:18.be possible within decades. In other news,
:02:19. > :02:20.the British government says it will look into whether Bitcoin could be
:02:21. > :02:22.used to improve The online currency works
:02:23. > :02:27.by using a series of codes, collected via rewards
:02:28. > :02:31.on the internet, to pay for things. It's become increasingly popular
:02:32. > :02:34.and the man who's in charge of controlling Britain's money, George
:02:35. > :02:38.Osbourne, says using it more could And you can find out more
:02:39. > :02:43.about Bitcoin and what it is with our special
:02:44. > :02:50.guide on the Newsround website. The leaders of the campaigns for
:02:51. > :02:52.and against Scottish independence went head to head last night
:02:53. > :02:56.in a live TV debate. Scotland's First Minister,
:02:57. > :02:58.Alex Salmond, and the leader of the Better Together campaign, Alistair
:02:59. > :03:02.Darling, spent more than an hour putting forward their case for what
:03:03. > :03:20.the future of Scotland should be. Now, old this week, will be looking
:03:21. > :03:25.at special events taking place to mark the start of World War I. As
:03:26. > :03:27.part of that, sex young singer 's have just done the performance of a
:03:28. > :03:30.lifetime. The stars of CBBC show The Big
:03:31. > :03:33.Performance have been working hard to come up with a song to sing at
:03:34. > :03:51.the BBC's World War One centenary Guys, you are performing in about an
:03:52. > :03:56.hour with, how are you feeling? Extremely nervous that I am more
:03:57. > :04:00.excited because it is such a big occasion. I'm going to type to
:04:01. > :04:08.channel that there is into energy so I am excited. It is good to be here
:04:09. > :04:15.because you need it to be beautiful and thoughtful, because these are
:04:16. > :04:17.war graves and it is not a pop site. Before we perform, someone very
:04:18. > :04:25.important wants to meet us, Prime Minister David Cameron. No way. To
:04:26. > :04:29.know people like David Cameron are keen for us and want us to succeed
:04:30. > :04:36.is amazing. He was asking who we were from, who wrote the song, so we
:04:37. > :04:41.got nervous and to ring him. The kids have met the Prime Minister,
:04:42. > :04:47.and done the rehearsal. In less than an art they will be singing here and
:04:48. > :04:56.are very nervous. I am just trying to keep my nerves away. I'm very
:04:57. > :05:08.nervous. My son is going to be heard by millions of people. -- my song.
:05:09. > :05:14.Shall we go in? Stand-up, be proud, they are all the heroes, for alive,
:05:15. > :05:24.for peace... # we walk as one... And you can see
:05:25. > :05:26.the Big performance every day this week on CBBC at 8:30 with that final
:05:27. > :05:30.episode from Belgium on Friday. And remember there's loads more
:05:31. > :05:34.on World War One on the Newsround website, including what the soldiers
:05:35. > :05:38.wore in battle, how many people fought and died, and the story of
:05:39. > :05:43.Horace, who went to war, aged 14. And that's also where we want you to
:05:44. > :05:47.get in touch and tell us if you're taking your pet
:05:48. > :05:52.on holiday with you this year. So if you're taking
:05:53. > :05:57.your pooch to Paris or Head to the Newsround website to
:05:58. > :06:03.find out how to get involved.