Babies are born with no knee caps. They don't appear until you reach the age of somewhere between 2 and 6. Baby eels are called elvers, and baby oysters are called spats. Our eyes remain the same size from the day we're born, but our nose and ears never stop growing. The only member of the band ZZ Top who doesn't have a beard has the last name Beard.
Hamsters are very fond of eating crickets.
Koala bears' fingerprints are almost indistinguishable from those of humans, so much so that they could easily be confused at crime scenes. In Star Trek, Mr. Spock's blood type was T-Negative. The octopus has eyes whose pupils are rectangular. The horn of a rhinoceros is actually made of compacted hair. It's believed that Shakespeare was 46 years of age around the time that the King James Version of the Bible was written.