:00:00. > :00:00.Hi, I'm Ayshah, this is Newsround live on CBBC, Coming up:
:00:07. > :00:23.What do you do when you drop food on the floor?
:00:24. > :00:27.Some fin-tastic news first up, a team of US Navy dolphins
:00:28. > :00:30.are coming out of retirement to help scientists investigate why whales
:00:31. > :00:37.Researchers from America think panicked whales dive away
:00:38. > :00:40.from sonar and ship noises, causing them to drift off course
:00:41. > :00:45.The super-clever dolphins are helping researchers
:00:46. > :00:50.to understand why the sounds are so off putting.
:00:51. > :00:52.If you love gadgets, you'll want to watch this.
:00:53. > :00:55.We've been to have a look at some of the latest inventions
:00:56. > :01:10.at the Wearable Technology Show in London.
:01:11. > :01:22.And what it does is it translates sign language to text that is
:01:23. > :01:24.displayed on the small screen, and speech that is
:01:25. > :01:26.spoken out through this small speaker.
:01:27. > :01:28.So as I sign, you're hearing what I'm saying
:01:29. > :01:33.anybody that uses sign language as their primary use
:01:34. > :01:35.of communication can wear it and be able to communicate
:01:36. > :01:39.So, this is a toy and game, you use your mobile
:01:40. > :01:47.phone or a tablet to bring them all to life using augmented reality.
:01:48. > :01:50.There are three swappable blocks, head, body and legs.
:01:51. > :01:54.But the really fun that we are trying to encourage
:01:55. > :01:57.is this combination of play between the real object
:01:58. > :02:05.This is a free to use mobile app that young surgeons who
:02:06. > :02:10.are learning how to operate can use anywhere, any time.
:02:11. > :02:14.And it allows them to practice on a fake patient,
:02:15. > :02:21.And they could do it on mobile, but they can also do
:02:22. > :02:25.So, with this, we can create interactive clothing, you can
:02:26. > :02:29.You can draw anything you like and it lasts
:02:30. > :02:31.for five to ten minutes before it fades away.
:02:32. > :02:34.So it is kind of bringing the concept of Snapchat
:02:35. > :02:37.The future of our technology will be in our homes very
:02:38. > :02:42.soon and also we'll see it more and more when we are out and about.
:02:43. > :02:46.If you're eating your breakfast now and you drop something on the floor,
:02:47. > :02:53.Well, now scientists say that might be OK - if you're quick!
:02:54. > :02:58.Have you ever picked up food from the floor and eaten it?
:02:59. > :03:14.Well, I need to get some honest answers here.
:03:15. > :03:16.So apparently some scientists are now
:03:17. > :03:18.saying it might not be so bad for you.
:03:19. > :03:22.It's the so-called five second rule, but hold up, there's loads of
:03:23. > :03:25.things you need to think about before you start telling your
:03:26. > :03:32.brother or sister to eat stuff from the floor.
:03:33. > :03:35.If it's sticky or sweet, probably worth giving it a miss.
:03:36. > :03:42.If it's pasta, biscuits or dried toast, then
:03:43. > :03:46.Have you ever eaten anything off the floor before?
:03:47. > :03:57.If you could clearly clean it off, and
:03:58. > :04:00.it obviously weren't dirty anymore, then probably.
:04:01. > :04:12.If I drop something, I wouldn't eat it.
:04:13. > :04:31.But I still don't think it's really hygienic.
:04:32. > :04:33.What would you say to those scientist who come up with
:04:34. > :04:38.I would go like, yes, you need to take another year and that.
:04:39. > :04:39.Mr scientist, I don't accept your five
:04:40. > :04:46.And I don't accept your three second rule.
:04:47. > :04:52.Go online to see how scientists missed millions of penguins off