Rattlesnakes change their rattle frequency based on nearby threats, a study finds
By Megan Marples, CNN Have you ever heard a rattlesnake rattling up close? It turns out the venomous reptiles change the frequency of their rattle the closer humans get to them, according to a new study published Thursday in Current Biology. Rattlesnakes prey on small animals like rodents and vibrate their tails when they feel
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