Snapple Facts

[Trinitis]

#131 Penguins have an organ above their eyes that converts seawater to fresh water.

[Stanley Burrell]

Speaking of which, Tuataras are quite unusual in having a pronounced parietal eye, dubbed the "third eye." Its current function is a subject of ongoing research. They are able to hear although no external ear is present, and have a number of unique features in their skeleton, some of them apparently evolutionarily retained from fish.