Flint Charges, Bison, Clearview AI

An update in the effort to hold someone accountable for the Flint, Michigan water crisis. Also, management of an important bison herd is returned to the Native American tribes who started it 100 years ago. Then, a controversial facial recognition app that helps police catch criminals faster is also raising questions about privacy and ethics. Additionally on today's show: how bacteria are causing Greenland’s ice sheet to melt faster, how teachers can make online learning less painful, and why scientists at MIT grew spinach capable of sending emails.