Where did all the water come from? Water, water everywhere. It covers 70 percent of Earth’s surface and earns it the nickname “the blue planet.” And yet… where did it come from? How is it so abundant ...

Beneath Earth s surface, nearly 3,000 kilometers down, lies a mysterious layer where seismic waves speed up inexplicably. For decades, scientists puzzled over this D' layer. Now, groundbreaking ...

A fiery mystery has puzzled geologists for decades: where did the lava fueling one of Earth’s largest volcanic events come from? A new study may finally have the answer. Scientists have long believed ...