Peat bog analysis contradicts cometary impact theory
(NEWSER) - New evidence undermines the theory that the impact from a comet killed off the woolly mammoth and enough humans to end the prehistoric Clovis culture, the BBC reports. Supporters of the impact theory point to a planet-wide rash of wildfires, but while a new analysis of sediment under North American peat bogs found evidence of increased wildfires over the 5,000-year period, nothing suggests a single, continent-wide blaze. More»