AI spots cancer early and an inventor's sorcery

An AI algorithm flagged early signs of breast cancer up to six years before radiologists detected it on mammograms. Also, Sequoyah single-handedly created an 85-character Cherokee syllabary in the 1800s, leading to mass literacy so rapid it was called sorcery. Meanwhile, a French nonprofit has provided 160,000 nights of shelter by turning empty offices into safe spaces after hours.