It's the hottest day of the year, and deep underground, a mysterious countdown has finally hit zero. After years of silence, millions of cicadas are emerging from the earth, ready to take the stage in a once-in-a-lifetime event. But how do these creatures synchronize their grand entrance?

In this episode of The Show About Science, Nate unearths the surprising history of the Kentucky Coffee Trees growing in his backyard and quickly becomes obsessed with germinating their seeds. This obsession leads him to a lab at the University of Illinois at Chicago where he meets up with plant...