United States Army

Crane Army resurrects C4 line, achieves full rate production

After more than a decade and a half, a team of Crane Army Ammunition Activity experts have restarted a once mothballed ...

Volcanoes blow smoke rings. Here's how they do it.

These ghostly hoops have been spotted above volcanic events around the world. But how they form has long been a mystery.

The moon-forming event: Why it was by explosive ejection rather than a giant impact

One of the oldest unsolved riddles in planetary science concerns the origin of the moon. Over a century ago, George Darwin ...