The appearance of oxygen in Earth's atmosphere was a turning point in the history of our planet, forever transforming the ...

This model reveals how vastly different the atmosphere was on ancient Earth, and how life may have first emerged. The key to unlocking the secrets of distant planets starts right here on Earth.

More than half a billion years ago on a frigid, ice-covered Earth, glaciers stirred up ingredients for complex life by bulldozing land minerals and then depositing them in the ocean, according to a ...

According to a new study, living cells outnumber stars in the universe, highlighting the deep, underrated link between geophysics and biology. By Dennis Overbye What’s in a number? According to a ...