Using fossil evidence and genetic dating, geneticists and paleontologists have backed strikingly different candidates for the world's first animal. When you purchase through links on our site, we ...

Today, Earth is home to animals of all shapes and sizes, from nearly microscopic creatures like tardigrades to 80-foot-long ...

Using fossil evidence and genetic dating, geneticists and paleontologists have backed strikingly different candidates for the world's first animal.

The first animal to appear on Earth was probably the humble sea sponge, American scientists believe. According to researchers at the world-famous Massachusetts Institute of Technology (MIT), sea ...

Fossils offer a glimpse into Earth's ancient life, revealing the origins and evolution of complex organisms. Discoveries like ...

Long before T. rex, the Earth was dominated by super-carnivores stranger and more terrifying than anything dreamed up by ...

Related: What was the first animal on Earth? And dating viruses through changes in their genetic sequence isn't helpful, either, because viruses can mutate significantly faster than bacteria can.

An award-winning zoologist, her spirited right-hand woman, and their sloth-sniffing rescue dog team up in Costa Rica’s lush jungles for the first-ever ...

An artist's impression of Quaestio simpsonorum. The newly-discovered creature, which lived some 555 million years ago, was one of the first to move by itself, and have a different left and right side.

Across the vast expanse of Earth’s 4.6-billion-year-long history, life has taken many forms. With the first microbes likely appearing a good billion years following the planet’s initial ...

The carcass ultimately led wildlife officials to a nearby ferret colony — the last known one on Earth, home to about 130 animals. With that, the extinct black-footed ferret was officially ...