Ian Randall is Newsweek's Deputy Science Editor, based in Royston, U.K. His focus is reporting on science and health ... spark is often provided by cosmic ray showers. These are cascades of ...

The "cosmic pinwheel" that astronomers feared could one day shower Earth with lethal gamma rays may not be as dangerous ... making the threat far less likely than previously thought.

Beyond the impact cosmic rays can have on the atmosphere, you think they may even play a role in human health. Can you share some of the work you are interested in? Cosmic rays existed long before ...

Space travel exposes astronauts to a unique set of challenges, one of the most dangerous being cosmic radiation. While ...