Beneath our feet, beyond the reach of sunlight, and buried in the most unforgiving corners of the planet, an unseen world thrives. Though these environments may seem desolate, and devoid of warmth, ...

In a breakthrough for the advanced study of gut health, scientists have developed a 3D microscopic version of the human intestines condensed into a small chip about half the size of a five-cent coin.

Earth’s crust teems with subterranean life that we are only now beginning to understand. Credit...Illustration by Brian Rea. Animation By Delcan & Co. Supported by By Ferris Jabr Ferris Jabr is a ...