Earth’s magnetic field plays a key ... at the center of the planet — once ranged from 500 million to 2.5 billion years ago. The research on the intensity of Earth’s magnetic field suggests ...

Complex, multicellular organisms emerged, setting the stage for the explosion of life on the planet over 500 million years ago in a time ... Nature Communications Earth & Environment, researchers ...

A human appetite hormone, bombesin, also controls feeding in starfish, showing it evolved over 500 million years ago. A team ...

Over 500 million years ago, during the Ediacaran Period, complex, multicellular organisms emerged, paving the way for the explosion of life on Earth. Researchers have uncovered evidence indicating ...

High in Canada’s Rocky Mountains, the animals of an ancient ecosystem can be seen battling for life. The fossils of the Burgess Shale offer a glimpse at the incredible diversity of early life on ...

A crater at the edge of the Yucatán peninsula in Mexico was created by a massive asteroid that hit Earth 66 million years ago At the end of the Cretaceous Period 66 million years ago, an ...

About 800 million years ago, oxygen levels reached about 21 percent and began to breathe life into more complex organisms. The oxygen-rich ozone layer was also established, shielding the Earth's ...