For decades, scientists have been baffled by two enormous, enigmatic structures buried deep inside Earth with features so ...

"We're arguing that intelligent life may not require a series of lucky breaks to exist." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. In the 1931 movie ...

How did Earth, alone among the solar system's rocky planets, become the home for life? How, among all this frigid lifelessness, did our planet become warm, hospitable, and life-sustaining? The answer ...

You’ve heard it before: we’re well into the sixth mass extinction of life on earth. Only this time, unlike the other five big ones, humans are overwhelmingly the killers responsible. As we continue to ...

The first molecules necessary for life on Earth could have been created when tiny flickers of “microlightning” between drops of water sparked the necessary chemical reactions. “This is a new way to ...

A rocky planet in the Milky Way galaxy may have an atmosphere, raising the possibility that life could exist on its surface, according to experts. TRAPPIST-1e, a planet belonging to a collection of ...