Browse content similar to 29/04/2014. Check below for episodes and series from the same categories and more!
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Hi, I'm Ricky and this is Newsround. First, the Olympics is the biggest | :00:08. | :00:12. | |
sporting event in the world with the next games set to be held in the | :00:13. | :00:16. | |
Brazilian city of Rio in 2016. But there's real worries the city won't | :00:17. | :00:20. | |
be ready in time, with loads of the buildings a long way off being | :00:21. | :00:24. | |
finished. A top Olympic boss has now said that Rio's preparations are the | :00:25. | :00:27. | |
worst he's ever experienced, and called the situation critical. | :00:28. | :00:32. | |
Next, it's thinner than paper, stronger than metal and could one | :00:33. | :00:35. | |
day be used to make bendy smart phones. Graphene has fascinated | :00:36. | :00:38. | |
scientists for years, but now they've found a new way to make it - | :00:39. | :00:42. | |
in a kitchen blender! You're not going to want to miss this. Take it | :00:43. | :00:54. | |
away, Martin! Harder than diamonds, 100 times stronger than steel. And | :00:55. | :00:58. | |
the thinnest material ever discovered. All these things make | :00:59. | :01:03. | |
graphene, a very useful material. Graphene was first made ten year ago | :01:04. | :01:09. | |
here at the University of Manchester when scientists realise their sticky | :01:10. | :01:14. | |
tape was pulling graphene crystals off a lump of graphite. As well as | :01:15. | :01:19. | |
being strong, tough and thin it is see through, bendy and conducts | :01:20. | :01:22. | |
electricity. In the future, it could be used to | :01:23. | :01:30. | |
make plane, bendy smartphones, even electronic paper. But graphene | :01:31. | :01:33. | |
crystals are so small, you need a lot of them to make things so the | :01:34. | :01:38. | |
search is on to find the best way to make them. | :01:39. | :01:41. | |
Now, a group of scientists in Ireland have found they can extract | :01:42. | :01:47. | |
thin layer of crystals but putting it in a kitchen blender It allows us | :01:48. | :01:52. | |
to make a large amount of graphene in a way that is cheaper than other | :01:53. | :01:56. | |
ways we have had before. The graphene you make with the blender | :01:57. | :02:00. | |
is very good for things like printable ink, you can make an ink | :02:01. | :02:05. | |
you can put in a printer and make headquarterically conducting | :02:06. | :02:11. | |
circuits op paper, there are other application, electronic, like | :02:12. | :02:16. | |
computer chips you can't use it for. We won't be using graphene planes | :02:17. | :02:21. | |
for a while but smartphones with graphene screens are in development. | :02:22. | :02:26. | |
Not bad for something discovered almost by accident. | :02:27. | :02:29. | |
Now if you don't like flying, look away now. This is Lukla Airport, | :02:30. | :02:33. | |
near to Mount Everest. Some call it the world's scariest, because pilots | :02:34. | :02:36. | |
have to time their take-offs to perfection so that they don't drop | :02:37. | :02:40. | |
off the end of the runway and down the sharp cliff. | :02:41. | :02:43. | |
And finally, the glow in the dark road markings being trialled in the | :02:44. | :02:45. | |
Netherlands are getting removed. It's because drivers began switching | :02:46. | :02:48. | |
their car lights off to experience the glow, causing dangerous | :02:49. | :02:52. | |
conditions on the road. That's all from me, Newsround's back tomorrow. | :02:53. | :02:57. |