In a first-of-its-kind experiment, scientists have successfully imaged atomic oxygen in liquid water, revealing behavior ...

As the war grinds on, sophisticated Russian defenses have pushed Ukraine to develop a frightening new weapon: semiautonomous ...

A single fossilized footprint, roughly 1 meter long, has pushed paleontologists to redraw the upper limits of dinosaur size ...

The United States is quietly rewriting what a helicopter can do in combat, fielding a new missile that can strike targets ...