February 4, 2013
Dinosaur-Killing Asteroid Was Twin Terror?
Colin Barras, NewScientist
Asteroids 2, dinosaurs 0. The infamous space rock that slammed into Earth and helped wipe it clean of large dinosaurs may have been a binary – two asteroids orbiting each other.
The dino-killing asteroid is usually thought of as a single rock with a diameter of 7 to 10 kilometres, but it may really have been two widely separated rocks with that combined diameter.
TAGGED: Dinosaurs, Asteroids