In short, about halfway to the center of the Earth you would be moving sideways about 1,500 mph (2400 kmh) faster than the walls of your tube. This fact is obviously terribly bad for your long ...

While the cutaway diagram appears to depict clear-cut divisions, knowledge about the deep interior of Earth is unavoidably fuzzy. It is nearly 4,000 miles to the center of Earth, ...

The Mantle This deep layer of warm rock accounts for two-thirds of the mass of our planet. The solid but pliable rock churns in slow motion, drawing heat from Earth’s center up toward the crust. There ...

Fantastically Wrong: The Real-Life Journey to the Center of the Earth That Almost Was Symmes would eventually earn an enormous audience for his theory in the US, touring tirelessly in the 1820s.

Let's say we want to build a model of the sun and Earth alone. Earth has a radius of about 6,371 kilometers (3,959 miles), but let's represent this with a marble 1 centimeter in diameter.

In July technicians in a Nagasaki port completed the final outfitting of the Chikyu (Japanese for planet "Earth") and handed over the colossal 57,500-ton, 210-meter-long white ship to CDEX.

However, over 4.6 billion years those fractions of seconds add up, with the team calculating that the center of the Earth is now about two and a half years younger than the surface, a sprightly ...