We'll also cover the tragic Cocoanut Grove nightclub fire, the woolly caterpillar's ability to predict winter and the Pythagorean theorem.

Stop Raking Fall Leaves, Stat! But you can't just leave them there either. We'll tell you another option that your lawn will eat up. Why Macadamia Nuts Are So Delicious and So Crazy Expensive They're not actually nuts, and they're not native to Hawaii either. Are they a healthy snack though? Do People and Bananas Really Share the Same DNA? We humans have something in common with everyone's favorite yellow fruit, but what exactly? The Pythagorean Theorem Makes Construction and GPS Possible This famous theorem didn't originate with the ancient Greek thinker Pythagoras, but it's still a pretty slick math trick. Move Over, Groundhog! Woolly Caterpillars Forecast Winter, Too! Are they any better at predicting weather than ol' Punxsutawney Phil? What We Learned From the Deadliest Nightclub Fire in U.S. History On a cold November night in 1942, the Cocoanut Grove nightclub was absolutely hopping. Before the night was over, though, the city of Boston would be changed forever. Raking photo: Neil Pritchard Photography/Moment/Getty Images Copyright © 2019 HowStuffWorks, All rights reserved. You are receiving this email because you opted in at our website howstuffworks.com Our mailing address is: HowStuffWorks 675 Ponce de Leon Drive NE Suite 8500 Atlanta, GA 30308 Want to change how you receive these promotional emails? You can update your preferences or unsubscribe from this list