:00:00. > :00:10.It's Tuesday, I'm Ayshah, and we've got the biggest stories you need to
:00:11. > :00:17.know this afternoon. On the way: Big news on how scientists think the
:00:18. > :00:20.universe started. Great Britain's Paralympic team meet the Prime
:00:21. > :00:25.Minister. This is Newsround. First up, how did the universe start? It's
:00:26. > :00:29.a huge question and one that scientists have spent years trying
:00:30. > :00:32.to answer. Now, a group of American scientists think they have found
:00:33. > :00:37.evidence that could help us find out how it all began. Nel's got more.
:00:38. > :00:55.It's one of the biggest questions ever, how did the universe begin?
:00:56. > :00:58.Well, one idea is the Big Bang theory, a massive explosion occurred
:00:59. > :01:01.almost 14 billion years ago creating the universe. Some scientists think
:01:02. > :01:04.this bang was so big that the universe expanded very quickly,
:01:05. > :01:08.stretching and squeezing space as it grew and putting a twist on the
:01:09. > :01:12.light created at that moment. Scientists in America used a
:01:13. > :01:19.telescope based in the South Pole where the skies are crystal clear.
:01:20. > :01:23.It's the left over light from the Big Bang itself. By looking at it
:01:24. > :01:28.carefully, they have been able to see the pattern in it that gives
:01:29. > :01:35.away with a was happening in the universe a trillionth a trillionth
:01:36. > :01:38.of a secretary after the universe began after the Big Bang. What does
:01:39. > :01:44.it mean for scientists like yourself? It is the first bit of
:01:45. > :01:55.evidence to show we really do understand where the Big Bang came
:01:56. > :01:59.from. The Big Bang theory is just one of many ideas about how the
:02:00. > :02:01.universe came into being. There are still loads of questions to be
:02:02. > :02:05.answered about this one, but scientists hope it could be a step
:02:06. > :02:08.in answering one of the biggest questions of all time. Next, Great
:02:09. > :02:11.Britain's Winter Paralympic team have spent the day showing off their
:02:12. > :02:13.medals to Prime Minister David Cameron in Downing Street. The
:02:14. > :02:16.athletes returned home yesterday bringing with them six medals in
:02:17. > :02:21.total, including their first Gold. Now for more than 300 years Scotland
:02:22. > :02:24.has been part of the UK and in six months' time, on September 18th,
:02:25. > :02:27.Scotland will hold a vote where people will be asked the simple
:02:28. > :02:30.question - should Scotland be an independent country? They'll have to
:02:31. > :02:34.decide Yes or No. It'll be a huge moment for the country and for the
:02:35. > :02:39.teenagers who get to vote for the first time. Here's Ricky. They the
:02:40. > :02:47.same age, have similar interests and live only 20 minutes apart. There is
:02:48. > :02:53.one thing that these two teenagers massively disagree on. My name is
:02:54. > :03:00.Lewis, in September I will vote No. I'm Sarah, I'm 16-year-olds, I will
:03:01. > :03:04.vote Yes in the referendum. On September 18th voters will be asked,
:03:05. > :03:08.should Scotland be an independent country and will have to choose Yes
:03:09. > :03:12.or No. This is the first time the voting age has been lowered so 16
:03:13. > :03:16.and 17-year-olds will get a chance to say how their country will be
:03:17. > :03:20.run. When it did first come out I didn't know much about it. I had to
:03:21. > :03:25.go and look at the two sides to make up my mind. Then I got quite into it
:03:26. > :03:29.and quite excited about it. It's something that I don't think many
:03:30. > :03:32.people my age are ever going to get an opportunity to do, no matter what
:03:33. > :03:39.country they are in. To be handed that opportunity just makes me feel
:03:40. > :03:49.so excited. Unbelievable. My name is anable, I'm 10-year-olds. I am Alex
:03:50. > :03:52.Sandra, I'm nine years old. Sarah and Lewis will decide what country
:03:53. > :03:59.their younger brothers and sisters will be growing up in. Sarah, why
:04:00. > :04:03.are you voting yes? I'm voting Yes, I think if we have independence for
:04:04. > :04:07.Scotland we will have more of a voice and do what we want and
:04:08. > :04:13.control our own things that we need and our own money. Lewis, why are
:04:14. > :04:20.you voting No? I don't think Scotland has the money to give
:04:21. > :04:24.people the life they deserve. The question may be a simple one, the
:04:25. > :04:30.choices made by people like Lewis and Sarah will shape Scotland's
:04:31. > :04:33.future for generations to come. Just enough time to show you some amazing
:04:34. > :04:36.snaps from the Sony World Photographers Award. 13 pictures
:04:37. > :04:40.taken by amateur photographers were chosen as winners. This cute pony in
:04:41. > :04:44.the snow was taken in the Netherlands, while the starry night
:04:45. > :04:46.sky was captured in Italy. Here's my favourite, taken in southern China
:04:47. > :04:52.showing people travelling in the rain. Finally, we know you love
:04:53. > :04:57.them, so Newsround's off to meet The Vamps. Head over to the Newsround
:04:58. > :05:01.website and tell us what you want us to ask them. Goodbye.