A surprising discovery beneath the Pacific Ocean reveals that Earth's molten outer core has reversed its flow direction, ...

Deep beneath our feet lies one of the most important parts of our planet: Earth’s core. Hidden thousands of kilometers below the surface, this massive sphere is made primarily of iron and nickel. At ...

Scientists have discovered that seismic waves traveling to Earth’s core and back caused almost all of Japan to shift eastward ...

LONDON — 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 ...

Here’s what you’ll learn when you read this story: Where Earth got most of its water is a subject of debate, but a new study suggests that the planet’s largest reservoir of hydrogen is not the ocean, ...

Earth's magnetic field is generated by the churn of its liquid nickel-iron outer core, but it is not a constant feature. Every so often, the magnetic north and south poles swap places in what are ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here's what you'll learn when you read this story: Gaze across the blue marble that is Earth, and the ...