Their teeth grow 3 feet a year. Arctic tern has longest. All the way around the world. The only marsupial in North America. Can give birth to 20 babies at a time.
All snakes are deaf.
Giraffes and humans have the same number. Giraffes have no vocal chords. Australian frog that swallows its young after giving birth, and they grow for several weeks. Stomach acid stops being secreted.