According to scientists who maintain that dinosaur extinction came quickly, the impact must have spelled the cataclysmic end. For months, scientists conclude, dense clouds of dust blocked the sun ...

Nearly all the trees died. Looy had told me that the Black Triangle was the best place today to see what the world would have looked like after the Permian extinction. This didn't look like ...

In this fight against extinction, Podolsky sees a cautionary tale about the importance of protecting rare animals “at the first sign of trouble”—not when only a few of them remain.