You may be interested in this week’s edition of the BBC radio programme “In Our Time“, hosted by Melvyn Bragg, which deals with the topic of Cosmic Rays.
From the BBC iPlayer site:
Melvyn Bragg and his guests discuss cosmic rays. In 1912 the physicist Victor Hess discovered that the Earth is under constant bombardment from radiation coming from outside our atmosphere. These so-called cosmic rays have been known to cause damage to satellites and electronic devices on Earth, but most are absorbed by our atmosphere. The study of cosmic rays and their effects has led to major breakthroughs in particle physics. But today physicists are still trying to establish where these highly energetic subatomic particles come from.
Carolin Crawford Gresham Professor of Astronomy and a member of the Institute of Astronomy at the University of Cambridge
Alan Watson Emeritus Professor of Physics at the University of Leeds
Tim Greenshaw Professor of Physics at the University of Liverpool.
The programme is available via iPlayer here: http://www.bbc.co.uk/iplayer/episode/b01sdnkg/In_Our_Time_Cosmic_Rays/ and is not subject to the normal 7-day removal rule, so should be available whenever you read this post. It is also available as a podcast from the various podcast sources (e.g. iTunes).