Rattlesnake Rattling Speed

Rattlesnakes create an auditory illusion that tricks us into thinking it's a lot closer than it is. Researchers pushed various objects toward the rattlesnakes while recording their reactions. Instead of rattling slightly faster the closer the object got, the snake doubled its rattling speed. The researchers think that the Rattlesnake uses this illusion as a sort of distance safety margin that warns attackers not to come any closer.

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