:00:00. > :00:00.It's 8:17 this Friday morning and you're watching
:00:00. > :00:16.Coming up: How do you turn back the clock at Big Ben?
:00:17. > :00:30.And how you get rid of waste on the International Space Station!
:00:31. > :00:33.First, world leaders have agreed to protect a massive area
:00:34. > :00:37.of water off Antarctica - home to the South Pole.
:00:38. > :00:40.The Ross Sea has penguins, whales and seals, and is about six times
:00:41. > :00:49.This new deal means that there can't be any commercial fishing
:00:50. > :00:52.there for the next 35 years, and makes it the largest marine
:00:53. > :00:56.It's hoped it'll help to protect wildlife that live there,
:00:57. > :01:03.Yes, it's about the environment but most of all it is about justice,
:01:04. > :01:05.and ensuring that we look after the environment
:01:06. > :01:10.There seems to be something fundamentally wrong about us
:01:11. > :01:12.destroying the ocean so our children and grandchildren
:01:13. > :01:21.This is what was supposed to happen when the Schiaparelli lander
:01:22. > :01:23.reached Mars last week, but things didn't go to plan.
:01:24. > :01:26.The parachute and rockets designed to slow it down didn't work
:01:27. > :01:29.Now new pictures are giving scientists more clues
:01:30. > :01:34.These images show the remains of the capsule in a crater,
:01:35. > :01:36.surrounded by a dark patch, which is thought to be
:01:37. > :01:42.Well, one mission that did go to plan is Tim Peake's six-month
:01:43. > :01:46.stay on the International Space Station.
:01:47. > :01:48.The British astronaut has been touring the country meeting children
:01:49. > :01:50.since coming back to Earth and he also caught up
:01:51. > :01:55.with Jenny to answer some of your burning questions.
:01:56. > :01:59.Oliver is seven and wants to know what you like to eat in space
:02:00. > :02:07.Eating in space is strange because there is no convection
:02:08. > :02:12.Some of the food tastes bland, so you would spice it up.
:02:13. > :02:20.On Earth, why is the sky blue but in space it is black?
:02:21. > :02:23.We always draw the sun as yellow, because it appears yellow to us
:02:24. > :02:33.It is the whitest light you will ever see.
:02:34. > :02:36.When the sun's light comes into our atmosphere it scatters
:02:37. > :02:38.all around and it is the scattering of the light,
:02:39. > :02:42.that is what makes it appear blue, and up in space it is just black
:02:43. > :02:44.because there is no atmosphere so the sun is not passing
:02:45. > :02:58.How did you get rid of the waste from the ship?
:02:59. > :03:01.We don't want to resupply with anything, so we recycle
:03:02. > :03:04.So today's coffee was yesterday's pee.
:03:05. > :03:10.For the stuff that we can't recycle, that gets put into a blue garbage
:03:11. > :03:14.bag you saw and it burns up in the atmosphere, so when you look
:03:15. > :03:24.The clocks go back an hour this Sunday morning at 2am meaning, yes,
:03:25. > :03:30.But while changing any clocks around your house might be a pretty
:03:31. > :03:33.easy and simple job, it's a huge task for the team
:03:34. > :03:39.Here's BBC reporter Tim Muffett to explain how they do it.
:03:40. > :03:47.The clocks go back this weekend, but spare a thought for the staff at the
:03:48. > :03:52.palaces of Westminster where the House of Commons and House of Lords.
:03:53. > :03:56.2000 clocks need turning back, but this is the most famous. I'm in the
:03:57. > :04:00.control room of the building you probably know as Big Ben, but that
:04:01. > :04:04.is actually the name of the bell at the top of the Elizabeth Tower. This
:04:05. > :04:10.the Victorian machinery that works the clock. You are part of the team
:04:11. > :04:15.that will stop the clock over the weekend. How will it work? On
:04:16. > :04:19.Saturday night, we will come here and stop the ticking of the clock.
:04:20. > :04:23.There will be no bells or quarter bells, nothing. We switch the lights
:04:24. > :04:26.of outside so no one knows what is going on and then we will move the
:04:27. > :04:31.hands quickly to midnight, and what would be the new midnight, then we
:04:32. > :04:35.will turn the hands back on with no bells and we will keep on going
:04:36. > :04:39.round until we have the time right. And at two a.m., the official time
:04:40. > :04:43.change, we will switch the lights back on and we will be back in
:04:44. > :04:48.Greenwich meantime. Thank you so much. Whatever you do, don't forget
:04:49. > :04:52.to turn your clocks and watches back, although smartphones sometimes
:04:53. > :04:54.do it themselves, there is still a real art to this, as Ian has been
:04:55. > :04:55.telling us. Now this Sumatran orangutan may not
:04:56. > :04:58.be as old as Big Ben, but she's been named as the oldest
:04:59. > :05:00.one on the planet! Puan lives in Perth Zoo
:05:01. > :05:03.in Australia, where keepers studied loads of records to work out that
:05:04. > :05:06.she's 60 years old. Primates like her usually
:05:07. > :05:08.live to the age of 50, but the zoo says she's
:05:09. > :05:12.doing well for her age. She's in very good condition
:05:13. > :05:14.and she looks incredible She has got a bit cranky in her
:05:15. > :05:19.old age, that might be the word, but everyone is entitled
:05:20. > :05:21.to have a bad day. She definitely deserves a lot
:05:22. > :05:23.of respect and she gets If her food doesn't come quickly
:05:24. > :05:31.enough she stamps her feet and gives us this little war dance,
:05:32. > :05:48.but she's easy to work with. at Chester Zoo featuring loads
:05:49. > :05:51.of pumpkins, of course. Bears, black panthers and meerkats
:05:52. > :05:53.have all been joining in the spooky spirit,
:05:54. > :05:55.ahead of the main day on Monday. And we want your pumpkin pics -
:05:56. > :05:59.go online now to send them