The World Wildlife Fund and partners have tracked population changes in Earth's animal species for decades. News from the latest "Living Planet" report, released Tuesday, is more grim than ever.
End-Permian extinction, which wiped out most of Earth's species, was instantaneous in geological time
The most severe mass extinction in Earth's history occurred with almost no early warning signs, according to a new study by scientists at MIT, China, and elsewhere.
A study that examined the shape of hundreds of fossilized shark teeth suggests that modern shark biodiversity was triggered by the end-Cretaceous mass extinction event, about 66 million years ago.
Fossil records tell us that the first macroscopic animals appeared on Earth about 575 million years ago. Twenty-four million years later, the diversity of animals began to mysteriously decline, leading to Earth's first know ...
Global climate change, fueled by skyrocketing levels of atmospheric carbon dioxide, is siphoning oxygen from today's oceans at an alarming pace—so fast that scientists aren't entirely sure how the planet will respond.
Sixty-six million years ago, the world burned. An asteroid crashed to Earth with a force one million times larger than the largest atomic bomb, causing the extinction of the dinosaurs. But dinosaurs weren't the only ones ...
Understanding Earth's species and ecosystems is a monumentally challenging scientific pursuit. But with the planet in the grip of its sixth mass extinction event, it has never been a more pressing priority.
The late Devonian extinction, about 370 million years ago, is one of the 'Big Five.' It killed up to 80 percent of species, obliterating the lavish Devonian coral reef ecosystem. The final pulse in this multi-step crisis, ...
Around 260 million years, the Earth was dominated by mammal like reptiles called therapsids. The largest of these therapsids were the dinocephalians, a genus composed of several herbivorous and carnivorous species.