When asteroids attack, dinosaurs lose. Though there are still competing theories as to why we lost awesome animals like Tyrannosaurus rex and Velociraptors, many scientists look to a long-ago asteroid impact to explain the wipeout.
A study published in Earth and Planetary Science Letters adds a new wrinkle to the asteroid assumption by suggesting that the dinos may have had to contend with not one, but two deadly balls of flying space rock. Titled "Morphology and population of binary asteroid impact craters," the study was lead by Katarina Miljkovic from the Institute of Earth Physics in Paris.
If you look out into space around Earth, you'll find that about 15 percent of asteroids are binary, meaning they're traveling in pairs. However, only 2 to 4 percent of craters on Earth have been labeled as binary impacts. Miljkovic believes this number is under-reported and that many binary asteroids have been overlooked because their craters overlap.… Read more