Anthropocene

A two-headed bull-shark embryo, found in the Gulf of Mexico, is the result of "the incomplete division of a single fertilized egg," an expert told Newsweek.

Footage from the day before her death shows the 16-foot whale approaching divers, which could have been a call for help.

A seal has been caught on film using a man-made mussel farm to hide from a pursuing orca pod off the Scottish coast.

The veteran broadcaster and naturalist appealed to political and business leaders to work together to protect the planet.

There are around 21 billion broiler chickens in existence—far outranking all other bird species.

How did the custom of dividing and categorizing time get started, and who gets to decide when there is a new age, epoch or era?

The Silurians are a fictional race of intelligent, bipedal reptiles from the British science-fiction series "Doctor Who" that supposedly lived on Earth hundreds of millions of years ago.

It has chronicled humanity's nuclear domination.

It's tricky to redefine what citizenship means in an era such as ours.

Nature, overpopulation and bad government choices have all contributed.

NASA's senior water scientist rings the alarm.

New research links the start of the "era of us" to the arrival of Europeans and the globalization of disease.

Within this century, climate change will bring "megadroughts" that will rival any drought seen for the past 1,000 years.

Five times in the history of the Earth, mass extinction events have wiped out the vast majority of life. Now it appears to be happening again