:00:07. > :00:11.Evening, guys, Ayshah here. First up, how did the universe
:00:12. > :00:15.start? It's a huge question and one that scientists have spent years
:00:16. > :00:18.trying to answer. Now a group of American scientists think they have
:00:19. > :00:22.found evidence that could help us find out how it all began. Nel's got
:00:23. > :00:30.more. It's one of the biggest questions
:00:31. > :00:33.ever: how did the universe begin? Well, one idea is the big-bang
:00:34. > :00:39.theory, a massive explosion that occurred almost 14 billion years ago
:00:40. > :00:43.which created the universe. Some scientists think this bang was so
:00:44. > :00:46.big that the universe expanded very quickly, stretching and squeezing
:00:47. > :00:53.space as it grew and putting a twist on the light created at that moment.
:00:54. > :00:56.This particular discovery was made by scientists in America using a
:00:57. > :01:02.telescope based in the South Pole, where the skies are crystal clear.
:01:03. > :01:06.They discovered a pattern seen in what we call the fading glow of the
:01:07. > :01:10.big bang. It's the leftover light from the big bang itself. And by
:01:11. > :01:13.looking at it very carefully, they've been able to see this
:01:14. > :01:17.pattern in it that gives away what was happening in the universe just a
:01:18. > :01:20.trillionth of a trillionth of a trillionth of a second after the
:01:21. > :01:24.universe began itself right at the time of the Big Bang. What does this
:01:25. > :01:28.mean for scientists like yourself? This is perhaps the first bit of
:01:29. > :01:31.evidence that may well show that we really do understand where the
:01:32. > :01:34.universe came from. The big-bang theory is just one of many ideas
:01:35. > :01:38.about how the universe came into being, and there are still lots of
:01:39. > :01:43.questions to be answered about this one. But scientists hope it could be
:01:44. > :01:49.a step in answering one of the biggest questions of all time.
:01:50. > :01:52.In just under an hour, Chelsea will face their old striker Didier Drogba
:01:53. > :01:57.when they play Galatasaray in the second leg of their last-16
:01:58. > :02:01.Champions League tie. The Blues drew 1-1 in the first leg and will want
:02:02. > :02:06.to avoid being the third English team to be knocked out at this stage
:02:07. > :02:09.of the competition. Now, do you recognise the man in the
:02:10. > :02:13.middle? Well, it's David Beckham, dressed up for his new role, a
:02:14. > :02:16.special appearance in a comedy show your parents probably watched. It's
:02:17. > :02:21.called Only Fools And Horses, and he's doing it for Sport Relief.
:02:22. > :02:25.Here's a sneaky preview. And if I asked you to go out into the High
:02:26. > :02:30.Street wearing a sarong, would you? Well...
:02:31. > :02:41.Now, before I go, the engine sound in this clip is pretty loud. Now,
:02:42. > :02:45.this is much quieter. The first was a Formula One car from last season
:02:46. > :02:49.and the second from this season. Some people complained that the new
:02:50. > :02:53.engines are too quiet and spoil the racing atmosphere, so there are
:02:54. > :02:55.plans to bring in noisier engines. Head over to the Newsround website
:02:56. > :02:57.to find out more. That's all from me for now. Good
:02:58. > :03:00.night, guys.