:00:00. > :00:00.Good morning, Ayshah here with your bank holiday Monday Newsround.
:00:07. > :00:10.Stay tuned for all of this: The 16-year-old British BMX
:00:11. > :00:24.superstar, and the wing suit pilot taking to the skies in China.
:00:25. > :00:28.First to the Great Barrier Reef in Australia, where it's thought
:00:29. > :00:31.as much as a third of the coral there has been destroyed.
:00:32. > :00:34.It's known for being home to some of the world's most
:00:35. > :00:38.Australian scientists say it's because of something called
:00:39. > :00:46.This happens when the water is too warm and the coral weakens,
:00:47. > :00:49.losing the colourful algae that provide oxygen and nutrients.
:00:50. > :00:52.Let's take a look at some sport results.
:00:53. > :00:55.First to Formula 1, and Lewis Hamilton is a very happy man.
:00:56. > :00:58.He's won his first race of the season in Monaco,
:00:59. > :01:00.beating his team-mate Nico Rosberg and cutting Rosberg's lead
:01:01. > :01:09.in the championship to just 22 points.
:01:10. > :01:12.And now to a sport we don't often hear about, the World BMX
:01:13. > :01:13.Championships in Colombia, South America.
:01:14. > :01:15.Teenager Bethany Shriever from Essex took part over the weekend.
:01:16. > :01:18.She represented Great Britain at junior level in the competition
:01:19. > :01:20.and earned herself a time trial silver medal.
:01:21. > :01:23.We've been to meet the 16-year-old to find out more about her
:01:24. > :01:42.My name's Bethany Shriever, and I'm a BMX racer for Team GB.
:01:43. > :01:45.I got involved in the sport of BMX when I was eight years
:01:46. > :01:50.One of his friends invited us down the track, and he gave me one
:01:51. > :01:53.of these and one of these, and I fell in love.
:01:54. > :01:55.BMX bikes are smaller and harder than most bikes.
:01:56. > :02:01.It's so they can take everything we put them through.
:02:02. > :02:04.They're made to be strong, because the track is really
:02:05. > :02:11.There are lots of jumps on the track, made on a really
:02:12. > :02:13.hard surface so that you can go really fast.
:02:14. > :02:16.These bikes are for tracks like this, whereas mountain
:02:17. > :02:18.bikes are made to go through puddles and mud.
:02:19. > :02:20.This month I'm heading to Colombia to compete in the BMX
:02:21. > :02:23.World Championships, representing my country.
:02:24. > :02:26.There will be loads of people competing from all over the world,
:02:27. > :02:30.but I'm the only girl competing for the UK in junior level.
:02:31. > :02:33.If you want to give it a go, get down to your local track.
:02:34. > :02:41.You don't have to be mad to do it, but it does help!
:02:42. > :02:42.To something that's really, really old -
:02:43. > :02:45.this fossilised skeleton of a massive sea reptile that lived
:02:46. > :02:50.The ancient bones were discovered at a quarry near Peterborough,
:02:51. > :02:52.and have been carefully put back together by scientists, who
:02:53. > :03:01.This is a fossil of a plesiosaur, which is a reptile that lived
:03:02. > :03:03.in the sea during the time of the dinosaurs.
:03:04. > :03:05.It was a very unusual-looking animal, nothing like anything
:03:06. > :03:10.It would have had a really long neck sticking out the front,
:03:11. > :03:11.a sort of barrel-shaped body, four large flippers
:03:12. > :03:22.shaped like wings almost, and a short tail at the back.
:03:23. > :03:24.Scientists have come up with a pretty interesting way
:03:25. > :03:27.The animals are an endangered species, but now it's hoped
:03:28. > :03:30.koala-tracking dogs might be able to find the animal by
:03:31. > :03:34.sniffing out their poo, or as they call it, scat.
:03:35. > :03:39.This is Maya, and she's on the hunt for koalas.
:03:40. > :03:42.The great thing with dogs as they can smell what we can't see.
:03:43. > :03:45.Koala poo smells very much of eucalyptus, and so they can help
:03:46. > :03:51.In many parts of Australia, their numbers are declining
:03:52. > :03:54.because of habitat destruction, so researchers are trying to figure
:03:55. > :03:56.out which are the most important areas to keep protected.
:03:57. > :04:02.You need a lot of stamina, because you have to cover a lot
:04:03. > :04:07.of ground and look under each tree for scats.
:04:08. > :04:11.For Maya, that is not a problem, she is playing, and she is 20 times
:04:12. > :04:17.And most importantly for conservation, she is 150% more
:04:18. > :04:19.accurate, so that means she finding scats where humans are not.
:04:20. > :04:24.For habitat protection, this is critical.
:04:25. > :04:27.But even the best detectors need to keep their skills up
:04:28. > :04:33.It's very simple, because we don't want to take her into the bush
:04:34. > :04:36.and for her to start indicating on possum poo or Eastern grey poo.
:04:37. > :04:39.We want to make sure that Maya knows what koala poo is,
:04:40. > :04:45.and excludes any other marsupial poo.
:04:46. > :04:48.If you think about it, dogs don't go to work for a salary.
:04:49. > :04:50.They go to work and for them it is playing.
:04:51. > :04:57.And on top of that, for this pup, tracking and playing fetch
:04:58. > :05:08.A US wing-suit pilot has attempted to hit an apple-size target dangling
:05:09. > :05:15.Jeb Corliss successfully did it, travelling at 120 miles per hour.
:05:16. > :05:18.He has also jumped from the Eiffel Tower in Paris
:05:19. > :05:23.and the Twin Towers in Kuala Lumpur in the past.
:05:24. > :05:25.Top Gear came back on telly last night.
:05:26. > :05:27.New presenters Chris Evans and co-host Matt LeBlanc
:05:28. > :05:30.took to roads in the US, Morocco and in the UK.
:05:31. > :05:32.People have been talking about the new show
:05:33. > :05:34.on social media, with some not liking it without the previous
:05:35. > :05:39.But others enjoying the new presenters,
:05:40. > :05:46.We want to know what you think about the new Top Gear.