Some of Earth’s earliest microbes evolved the ability to use oxygen hundreds of millions of years before it accumulated in ...

From the outside, Earth doesn't seem to have a lot going on in the hydrogen department… but that doesn't mean it's completely ...

Oxygen is everywhere on Earth today. But that hasn’t always been the case. Scientists think oxygen only became a lasting part ...

Hydrogen reserves in Earth’s core large enough to supply at least nine oceans may influence processes on the surface today.

We all know that we need things like water and oxygen to live, but what happens when you get too much? Join Hank Green for a ...

Since the beginning of January, an unusually long period of easterly winds has caused the average water level in the Baltic ...

Space startup General Galactic aims to fly a satellite using only water for in-orbit ...

Chemical records preserved in Pompeii’s public baths show how polluted well water shaped Roman bathing before aqueducts arrived.

Blue holes are among the least understood features of the ocean floor. From the surface, they can appear ordinary, even calm, ...

At the edge of Antarctica’s Taylor Glacier, a bright red stream pours out onto stark white ice, looking uncannily like blood. Known as Blood Falls, this phenomenon has unsettled explorers and puzzled ...

A new study suggests that some of the world’s oxygen-deprived oceans could eventually regain higher oxygen levels in the ...

As much as 45 oceans’ worth of hydrogen may be in Earth’s core, scientists reported, suggesting most of Earth’s water was ...