It's the iron atoms that form the 3D "solid" structure in a superionic state, and the lighter elements that flow around it like liquid. Earthquakes used to probe Earth's core ...

Iron is a brittle, hard substance, classified as a metal in Group 8 on the Periodic Table of the Elements. The most abundant of all metals, its pure form rapidly corrodes from exposure to moist ...

Think of an object made of iron: An I-beam, a car frame, a nail. Now imagine that half of the iron in that object owes its existence to bacteria living two and a half billion years ago. That's the ...

I want you to notice how flat the chart is near iron-56; many elements on either side have almost the exact same binding energy per nucleon. Now look all the way over on the left side to helium-4.