Did you know that South American river turtles start communicating while still in their eggs? 🥚🐢 Despite not having vocal cords and with their ears being internal, scientists discovered these turtles use super low-frequency sounds like clicks, clucks, and hoots 🎵🔊 heard only with a hydrophone (a special underwater microphone). Even more amazing, these sounds help sibling turtles coordinate their hatching so they emerge together! 🐣✨ Talk about teamwork! 🤝💦 facts fun fact animals science