dinosaurs
what really killed the dinosaurs? the two leading theories are a giant impactor from outer space smashing into the coast of mexico. and/or massive volcanic eruptions in india. which for the geographically impaired is pretty close to the other side of the world. (i had to check.) today. 65 million years ago india hadn't yet smashed into asia. and was a whole lot closer to being exactly opposite mexico. which was under water.
map. hmm... suspicious. one could imagine that the impactor shattered the crust on the other side of the earth. kinda like shooting a pumpkin with a high powered rifle. anywho i'm proposing the impact caused the volcanoes. which spewed so much toxic crap into the atmosphere it killed off everything lucky enough to have survived the actual impact. i have such pleasant thoughts don't i?