Decades ago, a renegade physicist suggested that gravity isn't so much a force as just a byproduct of the universe's tendency to get more disordered. Now this idea might finally be testable ...

There are different types of forces, though, and rules on what they can and can't do on domestic soil can be confusing. The past few months alone have seen a lot of activity.

(Tech. Sgt. Emerson Nuñez/Air Force) In the last week, the Air Force has flown all three of its bomber aircraft on multiple long-range missions to Europe, from their home bases in the United States.

My InsiderA massive 6,000 acre compound, KASOTC is dedicated to the training of special forces operators from around the world. It has everything it needs to train operators — a mock village, an ...