The essential ingredient for life, water, appeared on both planets around 4.4 billion years ago, new research indicates.

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.

There are more planets than there are stars, and at least a quarter are Earth-size planets in their star’s so-called habitable zone, where conditions are neither too hot nor too cold for life.

Researchers are trying to understand what makes Earth so special. As such, this model allows us to deepen our understanding of whether atmospheric evolution and the origin of life on Earth are ...

Modern philosophers will ask if we can even define life at all, as we still don't know much about its origins here on Earth. Others regard life as something that cannot simply be reduced to just ...

Recent findings from researchers at UCLA and NASA’s Goddard Space Flight Center are shaking up our understanding of life’s ...

And star gazing would be spectacular. But by the next morning, you'd begin to realize just how important the moon is for life on Earth. To start, between the sun, Earth's rotation, and the moon ...

From the bottom up, the image portrays the Arecibo radio telescope; the solar system; a human's average height (5'9"); an ...