Dinosaurs didn't die of the asteroid

Pretty interesting article about the discussion of the extinction of the great dinosaurs and of the theroy that made Gerta Keller a scientist of discussion:

"Keller and a growing number of colleagues around the world are turning up evidence that, rather than a single event, an intensive period of volcanic eruptions as well as a series of asteroid impacts are likely to have stressed the world ecosystem to the breaking point. Although an asteroid or comet probably struck Earth at the time of the dinosaur extinction, it most likely was, as Keller says, "the straw that broke the camel's back" and not the sole cause."