|Apocalypses may not be all fire and brimstone.|
A growing number of paleontologists say that Earth-smashing meteors cannot take all the blame for the many mass extinctions that dot our planet's fossil record. The true causes seem to be more complex.
"The [meteor] impact model has been so successful because it's easy to explain and easy to understand," said Nan Arens of Hobart and William Smith College in Geneva, NY. "However, the simple answer isn't always the best one."