All Class Clips content is available to watch on mobile, tablet and desktop devices on our new Knowledge & Learning BETA website.
The effect of space flight on the human body
Astronauts might be made of 'the right stuff' but 67% of them suffer from motion sickness at blast-off. And that's just the start of their physical troubles. In space, astronauts frequently experience muscle wasting, back pain, loss of bone mass and deteriorating vision. But their biggest worry is exposure to cosmic rays, found outside the Earth's protective atmosphere, which cause heart disease and damage DNA. A year in space could give you 219 times more radiation than you would get on Earth. First broadcast on 'Dara O Briain's Science Club' on BBC Two in December 2012.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.