Lead image: This artist’s conception depicts how the formation of the universe’s first stars may have appeared. Dense clouds ...

An experiment to quantify the amount of the universe’s lightest element in Earth’s core suggests that the planet’s water has ...

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 lacking in the most abundant element in the Universe. Bound to oxygen, it ...

Earth’s largest hydrogen reservoir may not be in its oceans but deep within its core. Laboratory experiments suggest that the ...

Earth's core contains nine to 45 times more hydrogen than the planet's oceans do, according to a new study that could settle a debate about when and how hydrogen was delivered to Earth.

With an estimated 6 sextillion kilograms of the stuff—that’s 21 zeroes by the way—the Earth’s core is another example of why hydrogen is the most abundant element in the universe.

Researchers have presented new measurements that account for half of the universe’s hydrogen gas — which had previously been regarded as “missing” in cosmic scientific discourse. The study was ...