Scientists have long theorized that primordial helium—helium-3, an isotope formed before Earth’s creation—exists in the planet’s core. Related Stories ・Earth’s inner core is far less ...

The discovery that helium and iron can mix at the temperatures and pressures found at the center of Earth could settle a long-standing debate over how our planet formed.

The core of the Earth is undergoing surprise structural changes, researchers believe. A new study has seen scientists unexpectedly find that the inner core of our planet is changing its physical ...

Iron sinks deep inside Earth and forms its core ... and heavy rains pour down on the planet. After several hundred million years of falling rain, great oceans form. 4,055 mya: Oldest known ...

Earth is our home planet, and it's the only place in the universe where we know for certain that life exists. Earth formed over 4.5 billion years ago from a swirling cloud of gas and dust squished ...

Scientists believe they may affect the planet's magnetic field because of the way they influence heat flow from Earth's core. There's a lot of debate about what LLVPs are.

Radioactive elements like uranium and hafnium are trapped inside the minerals that make up ... made up of the same mixture of meteorites as the Earth itself, potentially suggesting that the impactor ...