Left, a fossilized thecamoebian believed to have lived 720-635 mya. Right, a specimen from a group of modern amoebozoan testate amoebae Disclaimer: AAAS and EurekAlert! are not responsible for the ...

Of the heavy metals spewed by dying stars, the astronomers were particularly interested in iron-60. That’s because iron-60 is ...

A day on Earth was just 23.5 hours long, 70 million years ago. Researchers discovered this by studying the growth rings of ancient mollusk fossils. The findings could tell us more about or planet ...

But while lifeless during that time, the planet was already covered by vast oceans dotted with hydrothermal vent systems that ...

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 ...

A team of researchers at the University of Oxford have uncovered crucial evidence for the origin of water on Earth. Using a ...

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 ...