Hosted on MSN1mon
Over 500 million years ago, weird complex creatures emerged on Earth. Scientists now think they know why
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 ...
Hosted on MSN1mon
466 million years ago, Earth may have had a Saturn-like ring
Researchers have found clear indications that Earth may have had a ring system hundreds of million years ago. The recent discovery challenges the understanding of Earth’s ancient history.
Business Today4mon
'466-million-years ago': Earth once had ring system like Saturn, but it eventually fell to the ground
Researchers have proposed that Earth may have had a ring system 466 million years ago, during a period of intense meteorite bombardment known as the Ordovician impact spike. This finding ...
Forbes5mon
The Dinosaur-Killer Asteroid Came From Beyond Jupiter, Scientists Say
That moment 66 million years ago is a watershed in Earth’s history ... They estimate that in the last 500 million years, Earth has been struck almost exclusively by asteroids—or fragments ...
Forbes4mon
A Biologist Spotlights 4 ‘Invincible’ Animals That Survived The 5 Mass Extinctions
The nautilus has existed on Earth for around 500 million years and are certainly ... This ancient fish was once thought to have died out 65 million years ago, until it was rediscovered ...
National Geographic news3mon
Precambrian Time
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 ...