by Otto Johnson
Ice Age Haute Couture
Antisocial Brain Tissue Deficit
New Orleans, the New Atlantis?
First Cloned Piglets
Snakes with Legs?
Our Ancestors Were Knuckle-Walkers
Rare Arctic Asteroid
Other Amazing Discoveries
Recent textbooks list the weight as 5.98 sextillion metric tons. Either way, that's about one trillion metric tons for each person on Earth.Measuring With A Torsion Balance
To make their precise measurements, the researchers used a computer-controlled device called a torsion balance that records nearly imperceptible accelerations from the gravitational effects of four 8.14-kilogram (18-pound) stainless-steel balls on a 7.62-by-3.81-centimeter (3-by-1.5-inch) gold-coated Pyrex plate just 1.5 millimeters (0.591 inches) thick.