
TIL that crocodiles and alligators intentionally swallow rocks not just to grind food, but to use them as internal weight belts (called Gastroliths) for diving and to increase their maximum time underwater by nearly 117%.


TIL that crocodiles and alligators intentionally swallow rocks not just to grind food, but to use them as internal weight belts (called Gastroliths) for diving and to increase their maximum time underwater by nearly 117%.