Paula Scher looks back at a life in design (she's done album covers, books, the Citibank logo ...) and pinpoints the moment when she started really having fun. Look for gorgeous designs and images from her legendary career.

AI could unlock incredible benefits or unleash catastrophic risks — the difference depends on how we govern it, explains national security expert Paul Scharre. He explores why regulating the physical hardware that powers AI could ensure the technology is developed and used responsibly, before it’s too late.