In the early 1990s, a scandal rocked evoluÂtioÂnary biology: scienÂtists discoÂvered that songÂbirds — once thought to be strictly monoÂgaÂmous — engaged in what’s poliÂtely called “extra-pair copuÂlaÂtion.” In this unforÂgettÂable biology lesson on animal infiÂdeÂlity, TED Fellow DaniÂelle N. Lee shows how she uses hip-hop to teach science, leading the crowd in an updated version of Naughty by Nature’s hit “O.P.P.”