If you want to look into the early Earth, a key piece of the puzzle is the air of our planet’s ancient skies. Today, for instance, Earth’s atmosphere is filled with gases that support the ...

How long has our atmosphere been like the air we breathe today? What we have now is composed of about 78 percent nitrogen and 21 percent oxygen. Our earliest atmosphere was likely mostly hydrogen ...

Earth is the only planet known to support life. Learn about what Earth is made of and where it came from. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

As energy from the sun reaches Earth, some solar radiation is absorbed by the atmosphere, leading to chemical reactions like the formation of ozone and the breakup of gas molecules. A new approach ...

Atmospheric composition . Venus' atmosphere is made up of 96% carbon dioxide, 3% nitrogen and 1% other gases. ... Because life could have evolved in the planet's early, Earth-like history, ...

Save guides, add subjects and pick up where you left off with your BBC account. Scientists cannot be sure about the composition of the early atmosphere. No measurements can be made, so scientists ...

"The amount of oxidation in the ancient micrometeorites suggests that the early atmosphere was very rich in carbon dioxide," said co-author David Catling, a UW professor of Earth and space sciences.

The moon hasn't had a magnetic field for 4.36 billion years. That means it could hold fragments of the ancient Earth. When you purchase through links on our site, we may earn an affiliate ...