1+ day, 21+ hour ago  (226+ words) In this issue, we examine the health effects of tear gas, which evolved from being one of the first chemical weapons made for World War I to a tool for civilian crowd control. In a bizarre twist, one of its…...

2+ mon, 1+ week ago  (324+ words) The designs of flowers on Halafian pottery made almost 8,000 years ago (some shown) show geometric sequences in the number of petals. This is a human-written story voiced by AI. Got feedback? Take our survey . (See our AI policy here .) Plantlike…...

4+ mon, 3+ week ago  (285+ words) Genetic and stone tool similarities link a fossil bone with Neandertals 3,000 kilometers away Excavations decades ago at Crimea's Starosele rock-shelter, shown here, yielded a fossil bone that has now divulged a genetic glimpse of long-distance Neandertal treks into Asia. A…...

10+ mon, 18+ hour ago  (1156+ words) Senior physics writer Emily Conover has a Ph.D. in physics from the University of Chicago. She is a two-time winner of the D.C. Science Writers" Association Newsbrief award and a winner of the Acoustical Society of America"s Science Communication Award....