TIL harbor seals have about 100 whiskers that can detect the invisible water trails left behind by fish — like reading the wake of an airplane that already passed. When scientists covered a seal named Filou's whiskers with a nylon stocking, he immediately lost the ability to track prey. He could hun

Harbor seals possess approximately 100 sensitive whiskers that allow them to detect the subtle water trails left by swimming fish, akin to reading the wake of an aircraft. This remarkable adaptation enhances their hunting efficiency in the wild. In a fascinating experiment, scientists covered a seal named Filou's whiskers with a nylon stocking, resulting in a significant loss of his ability to track prey.