:00:00. > :00:07.Hi, guys. Ayshah here with news of why these cities are sinking on the
:00:08. > :00:12.way, plus... Why people are worried this whale is
:00:13. > :00:16.about to explode. You've got to keep watching Newsround.
:00:17. > :00:21.First to a warning that more needs to be done to stop some of the
:00:22. > :00:26.world's biggest cities from sinking into the sea. A new study found that
:00:27. > :00:30.the ground in some places near the ocean is much lower than it was just
:00:31. > :00:35.a few years ago. Here's Martin with more.
:00:36. > :00:39.New Orleans, Bangkok, Jakarta... Home to millions of people and some
:00:40. > :00:41.of the biggest and busiest cities in the world. Another thing they have
:00:42. > :00:48.in common though, is the world. Another thing they have
:00:49. > :00:52.all sinking. Scientists who carried out the study focused on five
:00:53. > :00:55.coastal cities and say in some areas land is sinking ten times faster
:00:56. > :00:59.than the sea level is rising. In North Jakarta, in Indonesia, the
:01:00. > :01:02.city has sunk four metres in the last 35 years. It can happen
:01:03. > :01:09.naturally but scientists say in this case one of the main reasons is
:01:10. > :01:13.manmade. Some cities get their drinking water
:01:14. > :01:16.from deep underground. They pump it to the surface but this has the
:01:17. > :01:27.effect of making the land dropped down. Tokyo is the capital of Japan
:01:28. > :01:31.and it went down two metres. Countries who want to follow Tokyo's
:01:32. > :01:34.example, would need to find a new way of sourcing water - something
:01:35. > :01:37.that's not always easy to do. So is this sinking something that can
:01:38. > :01:42.affect all areas near the sea? In the UK, the situation is
:01:43. > :01:46.different. In southern England and London, the land is going down by
:01:47. > :01:48.two millimetres a year but this has more to do with the way the land is
:01:49. > :01:52.relaxing. In Jakarta, they've built a sea wall
:01:53. > :01:55.to try to protect them - which helps keep flood water out but that
:01:56. > :01:58.doesn't stop the city sinking. Scientists say that measures like
:01:59. > :02:02.these will need to move quickly if the cities are to avoid serious
:02:03. > :02:06.problems in the coming decades. Next, if you ever argue with your
:02:07. > :02:09.brother or sister over who does best at school then listen up. New
:02:10. > :02:13.research suggests that kids born first in a family are more ambitious
:02:14. > :02:18.than their younger siblings when it comes to studying and going on to
:02:19. > :02:20.things like college and university. The study of 1,500 children
:02:21. > :02:26.suggested it might be because parents spend more time with their
:02:27. > :02:34.first kids than their later ones. Leah spoke to some of you about it.
:02:35. > :02:41.You are the oldest, first-born. Do you think that you are smarter than
:02:42. > :02:46.your sister? I think I am. I think it is a stereotype and I don't think
:02:47. > :02:52.it is true. Who is better at studying? My sister. Everyone is
:02:53. > :02:57.different and some people might like studying while other people might
:02:58. > :03:02.want to do something else. I work harder than my sister.
:03:03. > :03:07.And loads of you have been having your say on the Newsround website
:03:08. > :03:11.today. Rebecca's told us, "I'm more ambitious than my brother. He's 13
:03:12. > :03:14.and I'm ten, yet I go for things more." And Sarah says, "I don't
:03:15. > :03:18.think that it's true because I have a younger sister who is fourth born
:03:19. > :03:20.and she's much smarter than her older siblings." Thanks for those
:03:21. > :03:24.comments, guys. Now, you might want to stop eating
:03:25. > :03:27.if you're in the middle of your tea, because this story is a little bit
:03:28. > :03:31."urgh". People in Canada are desperate for a dead whale, washed
:03:32. > :03:36.up on their local beach to be moved, because they say it could explode at
:03:37. > :03:39.any moment. Watch this. Washed up on Canada's Newfoundland
:03:40. > :03:45.Island this blue whale is attracting a lot of attention. Most dead whales
:03:46. > :03:49.sink to the bottom of the ocean and decompose naturally. But when this
:03:50. > :03:53.doesn't happen, they can wash up on the shore and be very tricky to deal
:03:54. > :03:57.with. At over 30 meters in length, it's the largest animal on earth, so
:03:58. > :04:02.there's lots of stuff that has to decay. The sea creatures the whale
:04:03. > :04:05.has eaten before it died will be breaking down inside it's stomach,
:04:06. > :04:11.and as this happens, gasses - such as carbon dioxide - are released
:04:12. > :04:14.which create a build up of pressure. This pressure inside builds up like
:04:15. > :04:18.a balloon, and eventually, if there is no release, it will pop causing a
:04:19. > :04:22.mini explosion, which is what locals are worried about. At over 60 tonnes
:04:23. > :04:26.in weight it's a big task to try and move it, so politicians and local
:04:27. > :04:30.people are still trying to figure out the best course of action before
:04:31. > :04:33.it pops. Finally, to part of a space rocket
:04:34. > :04:37.found in the middle of a rainforest. A fisherman in a remote part of the
:04:38. > :04:42.Amazon in Brazil found debris the size of a car floating in a river.
:04:43. > :04:48.It's from a rocket used to launch a UK satellite nearby last year.
:04:49. > :04:53.Brazil has now asked the UK Space agency to come and pick it up.
:04:54. > :04:54.You can see more pictures of that on the Newsround website now. We're
:04:55. > :04:58.back at 6:50pm.