The Chicxulub asteroid and the #dinosaurs

And besides, how quickly do they think condi­tions changed when a multi-billion tonne asteroid smashed into the planet? Please note, I’m not saying the Chicxulub asteroid caused the extinction of the dinosaurs. I’m just saying that when an object bigger than Mount Everest ploughs into a planet at 100,000 km/hour, and with the force of just over... http://bit.ly/ch5FWo