#OceanKnows 【🐢 Why Do Sea Turtles “Cry”? Their Eyes Hide a Tiny Desalination Plant】 Sea turtles are often seen with “tears” glistening at the corners of their eyes — but they’re not sad. It’s a survival skill: living in the ocean means constantly ingesting salt. Their salt glands work like miniature desalination plants, expelling excess salt while keeping their eyes moist. So those aren’t tears — they’re nature’s quiet engineering. #SeaTurtles #WildlifeFacts #Nature #Documentary 📷 @natgeomagar

Half of the turtle species on Earth are threatened with extinction. On World Turtle Day, let's recognize these special animals and the vital role they play in our planet's ecosystems. | National Geographic