earth center

Suppose you dig a long tunnel to the center of the Earth, jump in it and let gravity pull you down. How long will it take you to reach the other side of the globe?

Russian physicists have discovered that earthquakes, volcanoes and other seismic processes depend not only on

Z-44 Chayvo oil well is the deepest place that people can dig, but we have to dig another 6,400km to reach the center of the Earth.