Research from Poland adds to evidence from Latin American countries that compounds in used cigarette butts ward off parasites in bird nests. By Lesley Evans Ogden Darwin’s finches in the Galápagos, ...

Researchers say they’ve discovered a supply-chain attack flooding repositories with malicious packages that contain invisible code, a technique that’s flummoxing traditional defenses designed to ...

In the era of A.I. agents, many Silicon Valley programmers are now barely programming. Instead, what they’re doing is deeply, deeply weird. Credit...Illustration by Pablo Delcan and Danielle Del Plato ...