FYI: If I Fell Through The Earth, What Would Happen In The Center?
Just getting to the center of the Earth and surviving is impossible. The Earth's core is about 9,000°F-as hot as the sun's surface-and would instantly roast anyone who found himself there. Then there's the pressure, which can reach roughly three million times that on the Earth's surface and would crush you. But let's not sweat the details. Once you arrive in the center of the Earth, the physics gets really interesting. Understanding gravity, the force of attraction between objects, is going to be key to wrapping your head around what is about to be a bizarre situation. The strength of gravitational attraction is determined by an object's mass and how close it is to another (more mass and closer together means increased force). The only gravity strong enough for us to feel comes from the Earth's mass, which is why we feel a downward pull on the surface. At the center...