Facing growing challenges from China, the U.S. Space Force was established in 2019 to maintain American superiority in space.

Official disclosures and open-source satellite imagery reveal the locations of four U.S. aircraft carrier strike groups.

Earth has rarely looked as remarkable as it does in this stunning shot (above) captured by NASA astronaut Don Pettit from the International Space Station (ISS).

For pacing, navigation, fitness stats and so much more, a GPS smartwatch is an essential accessory for every runner – and ...