Never mind Band-Aids, Neanderthals had antiseptic birch tar

Our view of Neanderthal life keeps getting more complex and vibrant. Neanderthals may have used birch tar as more than just glue; it could have helped them ward off infection and even insect bites. People from several modern Indigenous cultures, including the Mi’kmaq of eastern Canada, use tar from…

The science of how fireflies stay in sync

Engineers have uncovered the mathematical rules fireflies follow to sync up their flashes. Scientists have discovered that male fireflies in a South Carolina swamp follow local interaction rules to synchronize their flashing mating displays. The research is being presented at a meeting of the American Physical Society in Denver.…

Figuring out why AIs get flummoxed by some games

When winning depends on intuiting a mathematical function, AIs come up short. With its Alpha series of game-playing AIs, Google’s DeepMind group seemed to have found a way for its AIs to tackle any game, mastering games like chess and Go by repeatedly playing itself during training. But then…

Magnetars drag spacetime to power superluminous supernovae

Frame-dragging may explain an odd pattern seen in the brightest supernovae. Some of the most extreme explosions in the universe are Type I superluminous supernovae. “They are one of the brightest explosions in the Universe,” says Joseph Farah, an astrophysicist at the University of California, Santa Barbara. For years,…