The new (final?) Tunguska theory?
One of history's largest explosion could have been caused by iron asteroid entering and leaving atmosphere
Scientists give startling theory for 1908 Tunguska Event in Siberia which had force of 185 Hiroshima bombs.
See also: Conference on Quantavolution Athens 2011
First American immigrants arrived by sea - 16,000y ago+
Genetics show new patterns of human settlement for the Americas
Homo sapiens first foray into Greece, 210,000y ago
Life on a snow-ball
Newly discovered close exo-planets
Tiny islet close to Naxos reveals 4,600y old sanctuary