The moon's near and far sides exhibit striking asymmetry—from topography and crustal thickness to volcanic activity—yet the ...

Two Chinese satellites have rendezvoused with one another more than 20,000 miles above the Earth in what analysts believe is the first high-altitude attempt at orbital refueling. China’s Shijian-21 ...

From China to the U.S., here are the biggest casinos in the world, and a look into what they deliver, from entertainment ...

Events in the Middle East continue to grab headlines, and Russia’s invasion of Ukraine stays there as well. What gets less attention but may prove to be just as impactful to the United States' ...