Armadillos are the only animal besides humans that can get
leprosy.

A group of unicorns is called a blessing. Twelve or more cows are
known as a "flink." A group of frogs is called an army. A group
of rhinos is called a crash. A group of kangaroos is called a
mob. A group of whales is called a pod. A group of ravens is
called a murder. A group of officers is called a mess. A group of
larks is called an exaltation. A group of owls is called a
parliament.

Every time you lick a stamp, you're consuming 1/10 of a calorie.

The phrase "sleep tight" derives from the fact that early
mattresses were filled with straw and held up with rope stretched
across the bed frame. A tight sleep was a comfortable sleep.

"Three dog night" (attributed to Australian Aborigines) came
about because on especially cold nights these nomadic people
needed three dogs (dingos, actually) to keep from freezing.

Gilligan of Gilligan's Island had a first name that was only used
once, on the never-aired pilot show. His first name was Willy.
The skipper's real name on Gilligan's Island is Jonas Grumby. It
was mentioned once in the first episode on their radio's newscast
about the wreck.