Abraham Lincoln, who invented a hydraulic device for lifting ships over shoals, was the only US president ever granted a patent.
Antarctica is the only continent without reptiles or snakes.
Australia is the only country that is also a continent.
Baskin Robbins once made ketchup ice cream. This was the only vegetable flavored ice cream produced.
Bats are the only mammal that can fly.
Bats have only one baby a year.
Elvis Presley made only one television commercial - an ad for "Southern Maid Doughnuts" that ran in 1954.
Gerald Ford was the only US president not to have been elected to either the presidency or the vice presidency.
Giraffes are the only animals born with horns. Both males and females are born with bony knobs on the forehead.
Grover Cleveland is the only US president to have been married in the White House.
Hawaii is the only US state that grows coffee.
Honey is the only food that does not spoil. Honey found in the tombs of Egyptian pharaohs has been tasted by archaeologists and found edible.
James Buchanan was the only US president never to be married.
Maine is the only state in the United States whose name is just one syllable.
Ohio is the only US state without a rectangular flag. Ohio's flag is a pennant.
Q is the only letter in the alphabet that does not appear in the name of any state of the United States.
Teeth are the only parts of the human body that can't repair themselves.
