You've probably noticed those giant flaps mounted on the backs of many semi-trailers you see on the highway. Here's what they ...

Helicopters can be as dangerous as they are valuable, in part because of a phenomenon called rotor wash. What is rotor wash, ...

Standing on Earth's surface, the planet's mass creates a gravitational force sufficient to accelerate any object downward (toward the core of the planet, or perpendicular to the planet's surface ...

Standing on Earth's surface, the planet's mass creates a gravitational force sufficient to accelerate any object downward (toward the core of the planet, or perpendicular to the planet's surface ...

Gravity creates stars and planets by pulling together rock and gas. Without gravity, it would make everyday activities like eating and drinking very difficult.

Learn about gravity with these interactive learning resources for KS2 Science students aged 7-11 from BBC Bitesize. ... Gravity creates stars and planets by pulling together rock and gas.

The mathematics of the laws suggested that the origin of gravity was the object itself. That is, by virtue of its own mass any object may have an influence on another (massive) object.

A urine specific gravity test compares the density of urine and water. It can help doctors diagnose a variety of conditions, including dehydration.

Your urine specific gravity is generally considered normal in the ranges of 1.005 to 1.030. If you drink a lot of water, 1.001 may be normal. If you avoid drinking fluids, levels higher than 1.030 ...

This set of two bestselling zero-gravity chairs cost a mere $60 each, which is great value for your money. Their alloy steel frames are coated in a rust-resistant black finish, with a durable ...

A Provocative Argument About What Creates Serial Killers. In her new book, Murderland, Caroline Fraser argues that the rise of these criminals has deep roots in the release of industrial waste.