So, it's believed that the Earth's core is mainly iron and nickel. These aren't, however, the heaviest elements in the Earth's chemistry. There are plenty of heavier elements like lead, thorium, ...

Earth’s core may contain up to 45 oceans’ worth of hydrogen, a new study finds—an estimate that suggests that the planet formed from a gas-and-dust disk that was rich in the universe’s lightest ...

Though Earth's innermost core is solid, new research suggests that it hosts a lot of variation. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.