pid controller

Veritasium answers criticism that his videos make people look stupid, explaining that teaching must address learners' misconceptions and that holding common beliefs inconsistent with science is not stupidity.

A Last Week Tonight segment on the US opioid epidemic, tracing how prescription painkillers fed addiction and heroin use. It is the first of three episodes the show devoted to the crisis.

John Oliver's second Last Week Tonight segment on the opioid epidemic, covering the role of large companies in driving it. It touches on Purdue Pharma and the Sackler family.