How did a seemingly benign chemical and a near-miraculous public-health initiative spark decades and decades debate?

How a radio pioneer transformed life at sea.

In showing that cholera spreads through tainted water, an English doctor helped lay epidemiology’s foundations.

How one doctor’s letter and a string of dodgy studies spurred a public health panic.

Episode 4 from the ‘Innate: How Science Invented the Myth of Race’ series.

Episode 3 from the ‘Innate: How Science Invented the Myth of Race’ series.