A Mars Mission's Greatest Challenge: Radiation
daSeiz writes "A New York Times article explores the possible effects of prolonged radiation exposure in deep space. Surprisingly, very little is known about the subject. We'll need to find innovative new ways of shielding spacecraft from fraction-of-lightspeed interstellar rubbish if we're ever to spend much time outside our own magnetosphere."
Which just happen to be "suprisingly" similar to any rock found on Earth.
The owls are not what they seem