Earth's crust ranges from 5 to 70 kilometers in thickness and serves as the planet's outermost layer. This thin shell represents less than one percent of Earth's total mass, yet it's the only layer we ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. The beginnings of a strange layer of molten rock deep inside the Earth ...

Add Yahoo as a preferred source to see more of our stories on Google. Mine, tunnel front, silhouette of a standing worker. Earth's many layers are hidden from view. But what if we could drill through ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Earth's inner layers have just got a bit more complicated, with ...

(CNN) — Scientists have long wondered what lies at the very center of the Earth, and the latest research is putting weight behind a theory that our planet has a distinct ball of iron within its ...