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 ...

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 ...

Over two hundred fifty million years ago, India, Africa ... the collision of India with Asia we must first look beneath the Earth's surface. The continents are carried by the Earth's tectonic ...

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 ...