Manatees have fingernails on their flippers. elaborate share
Each zebra's stripe pattern is unique, like a human fingerprint. elaborate share
Nautilus shells have a pearly interior layer that's thicker than that of other shelled mollusks, making them exceptionally strong. elaborate share
Arctic foxes have incredibly thick fur, with up to 70 hairs growing from a single pore – far more than most other mammals. elaborate share
Giant pandas have a "false thumb," a modified wrist bone they use to help grip bamboo. elaborate share
Echidnas have four-headed penises. elaborate share
Cicada nymphs live underground for years, sometimes up to 17 years, before emerging as adults. elaborate share
