An Incredible YouTube Experiment Testing the Coriolis Effect

Do toilets really swirl in opposite directions based on the hemisphere you’re in?

YouTubers Veritasium and SmarterEveryDay (both of whom make fantastic science videos) did an experiment to test that idea — basically seeing if the Coriolis effect is really true.

How they did it is just incredible. It involves playing both of their videos at the same time. (I suggest opening them up separately, side by side, on your desktop.)

Very impressive, so freakin’ cool, and my head hurts just thinking about the logistics.