This Australian man came up with a foolproof methodology to determine if there are sharks in the water of any beach you were about to swim in. Scientists were dumbfounded at the elegance and simplicity of his method and could not dispute its effectiveness. Want to know what it was?
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You walk up to the water. Bend down and scoop up a little of the water. Put the water to your lips and taste it. If it tastes salty, there are sharks in the water.