Gamma rays may have
devastated life on Earth 24 September 03 New Scientist A
devastating burst of gamma rays may have caused one of Earth's worst
mass extinctions, 443 million years ago.A team of astrophysicists and
palaeontologists says the pattern of trilobite extinctions at that
time resembles the expected effects of a nearby
gamma-ray burst (GRB).
We have evidence that
supernovae occurred near the earth in the past.