Deep beneath the Earth lies a mysterious and powerful force. A wellspring of nuclear energy which could one day rip us apart. Many scientists have found clues that natural nuclear reactions have ...

Scientists have long known that Earth's core is mostly made of iron, but the density is not high enough for it to be pure ...

Deep beneath the Earth lies a mysterious and powerful force. A wellspring of nuclear energy which could one day rip us apart. Many scientists have found clues that natural nuclear reactions have ...

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.

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