We all know that when you flush a toilet or drain a sink in the northern hemisphere, the water drains counter clockwise. And we know it’s the opposite in the southern hemisphere. But what happens when the water is directly over the equator? Here’s the experiment done just five feet north of the equator (shot on our iPhone). The equator is the red line:Here’s the same tub of water draining just five feet south of the same red line:And here’s the same tub of water sitting directly on top of the equator, at exactly zero degrees latitude:What astounded us was how profound the effect was at just a distance of a few feet.