What will happen if the core of the Earth cools down?

Earth is known for producing life, but it also has a super hot core. Learn what would happen if Earth's core cooled down at HowStuffWorks. read more

What would happen to earth would be the same thing that we think happened to Mars. The hot core at the center of the earth is the main thing keeping the planet, and everything on it, alive. read more

Earth's core is about as toasty as the surface of the sun. It's been that way since, oh, about 4.5 billion years ago. That's when the planet first formed from a cloud of gases and particles. Gravity caused iron and other heavy substances to sink toward the middle of Earth, while lighter material like air and water rose to the crust. read more