99% Invisible Stitcher Studios

In the 55 years since the Saffir-Simpson Hurricane Wind Scale was created to warn us about hurricanes, hurricanes have become bigger, faster, and more devastating. There's now debate about whether it may be time for something new.

The leaf blower is one of the most hated objects in the modern world, but the reality of banning them is very complicated.

Whose job is it to fact check the Supreme Court? As it turns out, no one. So why is it like that, and what even happens when you prove them wrong?

Squirrels were purposefully introduced into our cities in the 1800s, and when their population exploded, we lost track of how many there are.

Roman talks to Jake Berman, author of "The Lost Subways of North America."

Featuring Brandy Zadrozny, senior reporter for NBC News who covers misinformation, conspiracy theories, and the internet, and covering the last section of Part 4, chapters 21-24.