what killed dinosaurus??

What Killed the Dinosaurs?
This is an interesting topic, for me anyway. Obviously, the prevalent theory is a huge asteroid hit the earth 65 million years ago. I've heard a couple of alternative theories, can't remember what, though. But, today I found this interesting article at time.com.

I personally do not know the answer, obviously. It makes no difference to know the answer, because well, life goes on. But, it still makes an interesting debate, no?

Quote:
Maybe an Asteroid Didn't Kill the Dinosaurs


By Jeffrey Kluger Monday, Apr. 27, 2009

When a scientific principle is common knowledge even in grammar school, you know it has long since crossed the line from theory to established fact. That's the case with dinosaur extinction. Some 65 million years ago — as we've all come to know — an asteroid struck the earth, sending up a cloud that blocked the sun and cooled the planet. That, in turn, wiped out the dinosaurs and made way for the rise of mammals. The suddenness with which so many species vanished after that time always suggested a single cataclysmic event, and the 1978 discovery of a 112-mile, 65-million-year-old crater off the Yucatán Peninsula near the town of Chicxulub seemed to seal the deal.

Now, however, a study in the Journal of the Geological Society throws all that into question. The asteroid impact and dinosaur extinction, say the authors, may not have been simultaneous, instead occurring 300,000 years apart. That's an eyeblink in geologic time, but it's a relevant eyeblink all the same — one that occurred at just the right moment in ancient history to send the extinction theory entirely awry.

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