In 2004, Andre Geim and Konstantin Novoselov at the University of Manchester in England achieved a breakthrough when they isolated graphene for the first time. A flat form of carbon made up of a single layer of atoms, graphene is the thinnest known material—and one of the strongest. Hailed as …

MONTREAL — When Austin Kaiser arrives at a PGA Tour stop, he first does his homework: He walks every inch of the golf course for his player, Xander Schauffele. Maybe he talks to a few other caddies along the way, chatting with a buddy or two as he scribbles notes …

NASA’s Curiosity rover has been exploring the Gale Crater on Mars since 2012. That’s a long time to weather dust storms, drive along the base of a mountain and crawl over endless pointy rocks. The rover’s aluminum wheels have taken a beating. New images show some dramatic gaping holes, but …