It starts with a question no gunner can answer in the moment: how many shells will it take to bring down that one-aircraft—a hundred, a thousand, or tens of thousands? The truth, learned the hard way ...

If you’ve ever played peekaboo with your little one, you’ve helped them work on object permanence. Your baby is learning that people and objects exist even when they can’t see or hear them. Object ...

A global plea is growing for Elon Musk to rescue three Chinese astronauts stranded in space after their return capsule was reportedly struck by an 'unknown object.' The Shenzhou-20 team, mission ...