A study from Ohio State University finds bats can remember a ringtone if they associate the sound with food - for years, in some cases.
Today is the birthday of Roger Babson, who once hired stonecutters to carve giant motivational slogans into a series of boulders in Massachusetts during the Great Depression. Plus: a research team from Harvard and MIT has announced a new high-tech face mask with disease-spotting biosensors. It can spot germs more or less in real time!
Millions of people are wearing masks these days to protect themselves and others. And researchers in Australia have found a way to reuse those single-use, disposable masks to make new roads. Plus: it's National Pizza Day, so here's a very geometry-heavy way to slice up a pizza and still make it equal for two eaters.