By Erica Ackerberg Paul Fussell’s 50-year-old survey of trench warfare deserves a new generation of readers, our book critic writes. The standout essays in Megan Marshall’s “After Lives ...

Bret Taylor, the chairman of OpenAI’s board, said the artificial intelligence company was “not for sale.” Mr. Musk is separately raising money for his A.I. start-up, xAI. By Cade MetzMike ...