Dust from asteroid breakup may have caused Ordovician ice age

Thu, 09/19/2019 - 20:54 -- pheck

About 466 million years ago, long before the age of the dinosaurs, the Earth froze. The seas began to ice over at the Earth's poles, and the new range of temperatures around the planet set the stage for a boom of new species evolving. The cause of this ice age was a mystery, until now: a new study in Science Advances lead by Birger Schmitz, a Professor at Lund University and an international team of colleagues incl. Philipp Heck, Pritzker Associate Curator and University of Chicago Associate Professor (part time), argues that the ice age was caused by global cooling, triggered by extra dust in the atmosphere from a giant asteroid collision in outer space.
Read more.