A new study from the University of Colorado Boulder offers compelling evidence supporting the widely discussed 'Snowball Earth' theory, proposed in 1992 by American geologist Joseph Kirschvink.

which ended approximately 66 million years ago (after a meteor strike, many scientists believe, eliminated the majority of life on Earth). For most of the Cretaceous, Canada’s prairie provinces ...

Researchers have proposed that Earth may have had a ring system 466 million years ago, during a period of intense ... reshape the world ‘Hubble’s 100,000th shot’: A blazing Quasar and ...

The moon may have received a volcanic facelift, making it more than 100 million years older ... began forming about 4.6 billion years ago, or about 250 million years earlier.

Almost any spot will do. Her world—100 million years ago in Myanmar—is not one of vast seas, towering mountains or broad deserts, but a damp and gnarled landscape of branches, trunks and ...

The Early Cretaceous Epoch lasted from 145 million years ago to 100.5 million years ago and the Late Cretaceous Epoch lasted from ... the end of the period the continents had moved almost into the ...

Scientists propose Earth ... a million-year stay near dense star nurseries, possibly cooling the planet as Antarctica’s ice grew. Gaia data shows our solar system swung within 65 light-years ...

Dinosaurs are the extinct relatives of birds that roamed the lands and seas of ancient Earth. They first appeared around 240 million to 230 million years ago in the Triassic Period, and went ...

A new study reveals that Earth's biomes changed dramatically in the wake of mass volcanic eruptions 252 million years ago.

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 ...

It may have penetrated the Earth's atmosphere ... the Orion region occurred between approximately 18.2 and 11.5 million years ago, with the most likely time between 14.8 and 12.4 million years ...