Australia is the only continent without an active volcano.
Antarctica is the only continent with no owls.
Your big toe only has 2 bones and the rest have 3.
Koalas only drink water in extreme heat or drought.
The only lizard that has a voice is the Gecko.
Flamingos can only eat with their heads upside down.
The only insect that can turn its head is a praying mantis.
Only female mosquitoes bite.
Ohio is the only U.S. state that does not have a rectangular flag.
David Rice Atchison was President of the United States for only one day.