Around 66 million years ago, a six-mile-wide asteroid hit Earth, triggering the extinction of three-quarters of all living ...

The extinction of hundreds of bird species caused by humans over the last 130,000 years has led to substantial reductions in avian functional diversity -- a measure of the range of different roles ...

Other extinction events included the initial growth of trees, which likely caused the death of 70 percent to 80 percent of animal species on Earth in the Devonian, starting 375 million years ago. But ...

Sloth size and habitat shifted multiple times over the past 35 million years, but human hunting likely drove the slower, ...

Are humans the only species to drive another to extinction? Tom Ruppel | Dixon ... of contemporary extinctions in land vertebrates were caused, at least in part, by invasive species.

The debate has raged for decades: Was it humans or climate change that led to the extinction of many species ... the new cold and dry conditions caused large-scale extinctions in some regions ...

The extinction rate they calculated was 150 ... Live Science's final estimate for the number of animal extinctions caused by humans is 381,150. That's a rough estimate and should be taken with ...

It comes from my absolute favorite mass-extinction event—yes ... previous in that it’s clearly caused by us. In the pursuit of our own interests, humans are profoundly reordering every ...

High levels of lead, arsenic, and iron—which continue to harm animals and humans today— appear to have caused deadly deformities ... It was the second largest mass extinction in history ...

The extinction of hundreds of bird species caused by humans over the last 130,000 years has led to substantial reductions in avian functional diversity—a measure of the range of different roles ...