A Guy Carved Slogans Into Giant Boulders To Get People To Think Positive (Cool Weird Awesome 567)
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!