Astronaut Mars mission risk assessed
Nasa's Curiosity rover has confirmed what everyone has long suspected - that astronauts on a Mars mission would get a big dose of damaging radiation.
The robot counted the number of high-energy space particles striking it on its eight-month journey to the planet.
Based on this data, scientists say a human travelling to and from Mars could well be exposed to a radiation dose that breached current safety limits.
Our correspondent Jonathan Amos discussed the findings with lead researcher Dr Cary Zeitlin from the Southwest Research Institute in Boulder, Colorado, US.
30 May 2013
- From the section Science & Environment