New evidence supports extraterrestrial impact theory

The discovery was made by an 18-member international team of researchers including James Kennett, professor of earth science at University of California Santa Barbara (UCSB).

Did comet smashup unleash Earth`s mini Ice Age?

It has been called the Big Freeze, the Last Blast of the Ice Age or -- to use the scientific name -- the Younger Dryas, and for climate experts it is one of the big mysteries of their field.