Earth’s inner core has long puzzled scientists because seismic waves move through it unevenly. Compressional waves from earthquakes travel about 3 to 4 percent faster along the planet’s rotation axis ...

A meteorite that fell in Germany in 1724 contains a form of silica that conducts heat in a stable manner and baffles physicists.

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.

Silicon isotope geochemistry offers a robust framework for deciphering the complex cycling of silica in Earth’s surface environments. Central to this field is the understanding of how isotopic ...

Picture all of Earth’s oceans, which cover about 70% of the planet and are mostly made of hydrogen. Now multiply that by nine. That may be the amount of hydrogen in Earth’s core, possibly making it ...