Microscopic tunnels hidden inside desert rock are forcing scientists to rethink how ancient life spread across Earth. These ...

In high enough doses, hydrogen cyanide can kill an adult human in minutes, but the chemical may be the reason why we’re here ...

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 ...

For more than a century, the idea that life might have arrived on our planet from elsewhere in the cosmos sat at the fringes ...

Here’s what you’ll learn when you read this story: Our Earth as we know it had a “proto-Earth” phase that didn’t survive long before it was pummeled by an asteroid. Researchers who compared levels of ...

Researchers discovered that continents don’t just split at the surface—they also peel from below, feeding volcanic activity in the oceans. Simulations reveal that slow mantle waves strip continental ...

The tops of these mountains contain rocks formed in ancient rivers and streams and hold fossils of ancient fish and sharks. Photo courtesy of Dr. Neil Shubin The North and South Poles, also known as ...

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

The object, the latest “quasi-moon” detected by astronomers, could be with us for almost another 60 years. By Robin George Andrews The Earth stands alone in the solar system as a habitable world, as ...