Black poop can be harmless, caused by certain foods or medications, or it can be a sign of melena, meaning there’s blood in your stool. Melena happens when bleeding occurs in the upper digestive tract ...

In “Outside the Box,” I interrogate ChatGPT to better understand how AI “reasons.” It’s like a conversation with an intelligent friend, sharing ideas and challenging some of the explanations. A ...

Last April, in a move generating scant media attention, the Air Force announced that it had chosen two little-known drone manufacturers — Anduril Industries of Costa Mesa, California, and General ...