“Deep Freeze” –Extraterrestrial Dust Cloaked Earth from Crack-Up of 93-Mile-Wide Asteroid



Ice Age


“Normally, Earth gains about 40,000 tons of extraterrestrial material every year,” says Philipp Heck, a curator at the Field Museum and associate professor at the University of Chicago, about Earth’s deep freeze 466 million years ago, long before the age of the dinosaurs, from dust created by a colossal asteroid collision. “Imagine multiplying that by a factor of a thousand or ten thousand. To contextualize that, in a typical year, one thousand semi trucks’ worth of interplanetary dust fall to Earth. In the couple million years following the collision, it’d be more like ten million semis.”