How do we know that a meteor caused the extinction of the dinosaurs?

What killed the dinosaurs? An asteroid wiped them out, right? New research suggests that even before that cataclysm, dinosaurs weren't doing so well.

New research confirms that the next mass extinction is in progress, and we’re the cause.

Newly discovered Dutch manuscripts describe the extinct wildlife of Mauritius Island.

The populations of the nine species of Indian vultures began to plummet in the 1990s

A relatively small number of people are required to destroy and ecosystem

Martha, last of the passenger pigeons.