:00:00. > :00:00.This is Newsround, coming to you live from CBBC HQ.
:00:07. > :00:13.On the way: Find out why Devon's top dog.
:00:14. > :00:27.And why temperature is so important to these baby turtles.
:00:28. > :00:31.Today's a big day for space exploration, as a rocket will blast
:00:32. > :00:34.off to try to find out more about the Red Planet,
:00:35. > :00:41.Here's Leah with more on this mission.
:00:42. > :00:44.The Trace Gas Orbiter will blast off from Kazakhstan as the first
:00:45. > :00:48.of a two-part mission that will study the Mars atmosphere.
:00:49. > :00:51.Its mission is to search for signs of life and test
:00:52. > :00:55.equipment needed for a second flight, due to leave Earth in 2018.
:00:56. > :00:58.The main thing the Orbiter will be looking for is methane gas.
:00:59. > :01:02.It is this gas that could show if there
:01:03. > :01:08.It's equipped with tools to sniff out
:01:09. > :01:11.gases from the atmosphere, find water ice, and a camera
:01:12. > :01:17.It also carries a small vehicle, called
:01:18. > :01:18.Schiaparelli, that will land on the planet.
:01:19. > :01:21.This vehicle will enter the atmosphere at over 15,000 mph,
:01:22. > :01:24.a heat shield, parachute and thrusters will help to slow it
:01:25. > :01:34.Schiaparelli is battery powered so will only last a few days
:01:35. > :01:37.on the surface, but it is hoped its weather sensors and camera
:01:38. > :01:39.will be able to get a snapshot of the Martian environment.
:01:40. > :01:41.Scientists think the information sent back may
:01:42. > :01:46.be able to tell us if there was ever life on Mars.
:01:47. > :01:49.Joining me on the sofa now is Professor Tim O'Brien -
:01:50. > :02:06.Tim, that blows my mind just seeing it, but how big is this mission? It
:02:07. > :02:10.is important. Any mission to Mars is important. This is about finding if
:02:11. > :02:18.there's any life on Mars, which is important. It'll be sniffing out
:02:19. > :02:25.methane? Methane on the earth is produced by biological organisms, by
:02:26. > :02:33.life. The question is, whether on Mars the methane BC, is that
:02:34. > :02:40.produced by Blyth? The on Mars? -- microbes. This mission is taken off
:02:41. > :02:47.at 9:30am. How long will it take to reach Mars? The rest of the day, we
:02:48. > :02:52.will be on tenterhooks to see if it reaches the speed it needs to reach
:02:53. > :02:59.Mars. We will find out tonight. It is seven months before it gets
:03:00. > :03:03.there. Will we soon put people on Mars? Every mission to Mars, we
:03:04. > :03:09.learn something new. It will help for people going there. It was only
:03:10. > :03:10.20 or 30 years before we see people walking on the surface. Thank you
:03:11. > :03:13.for coming in. Can you imagine if temperature
:03:14. > :03:16.decided whether you were born a girl Well, that's what happens
:03:17. > :03:19.with turtles. Experts are now worried that rising
:03:20. > :03:22.temperatures could cause problems This team of scientists
:03:23. > :03:36.have crossed deserts, seas and beaches to dig
:03:37. > :03:38.for buried treasure. They've come to the Lacapede Islands
:03:39. > :03:42.in the Kimberley, Western Australia, to find
:03:43. > :03:43.out more about turtles and how climate change
:03:44. > :03:45.will affect their future. We go out into the Kimberley and
:03:46. > :03:48.collect eggs from nesting females. We then bring those eggs back
:03:49. > :03:51.to incubate them at constant temperatures, to find out the switch
:03:52. > :03:53.point where they switch At certain temperatures,
:03:54. > :03:58.these eggs switch from having males For humans and other mammals,
:03:59. > :04:02.whether you are born a boy or a girl is decided
:04:03. > :04:04.by what genes you have. But for some reptiles,
:04:05. > :04:07.like these little turtles, it is actually caused by how hot
:04:08. > :04:11.or how cold the egg gets. For many turtles, if the sand
:04:12. > :04:15.is warmer than 29 degrees, there's a good chance
:04:16. > :04:18.they will be girls. If it is any cooler,
:04:19. > :04:21.it will probably be boys. The problem is, temperatures
:04:22. > :04:23.around the world are going up, and that means too many
:04:24. > :04:28.girl turtles will be hatching. If it keeps getting
:04:29. > :04:32.warmer, there will be more females being produced,
:04:33. > :04:34.and over time, the males will keep dying at a greater
:04:35. > :04:36.rate than they are So it is what we call
:04:37. > :04:39.demographic collapse. Scientists don't believe
:04:40. > :04:41.a population crash will happen right away, but they are concerned that
:04:42. > :04:45.if we don't prepare for it, I don't think turtle populations
:04:46. > :04:50.are at risk of becoming extinct any time soon, they live for a long
:04:51. > :04:54.time, for potentially 120 years females can still be breeding,
:04:55. > :04:59.so the changes are going to be slow, but the point here is that climate
:05:00. > :05:02.change is very rapid compared to what turtles have
:05:03. > :05:03.experienced in the past. Finding a solution is
:05:04. > :05:05.vital, so with research like this, hopefully more of these
:05:06. > :05:08.little hatchlings can look forward to a happy future, even if they do
:05:09. > :05:15.have a few obstacles along the way. A white westie dog called Devon has
:05:16. > :05:28.won the Crufts dog competition. Devon was named Best In Show
:05:29. > :05:32.at the annual dog show It's the first time his breed,
:05:33. > :05:37.a West Highland terrier, has won the top prize at Crufts
:05:38. > :05:45.in the past 26 years. I bet Hacker and Dodge
:05:46. > :05:52.are really jealous. That's all from me,
:05:53. > :05:55.Newsround's back right