More than 3.5 billion years ago, the Earth was not the hospitable world we know today. The atmosphere lacked oxygen, the seas were acidic and rich in iron, and volcanic activity roared across a barren ...

They race, they spin, they shoot. Meet the organisms for which physical prowess is more than sport—it’s a matter of life and death ...

People have long wondered what life was first like on Earth, and if there is life in our solar system beyond our planet. Scientists have reason to believe that some of the moons in our solar system – ...

Groundwater hides dense communities of rock-bound microbes that shape water quality and help store carbon below ground.

When humans need more Vitamin B12—a nutrient that makes healthy red blood cells and turns food into energy—we can get it by taking a supplement or eating fish. But what about ocean life, including the ...

It's tiny and needy, but is it alive? That's a question prompted by recent research that highlights a surprisingly complex part of biology. The organism in question is a microbe called Sukunaarchaeum ...