Only humans sleep on their backs.
Shrimp's hearts are in their heads.
A day on the planet Mercury is twice as long as its year. Mercury rotates very slowly but revolves around the Sun in slightly less than 88 days.
Butterflies use their feet to taste things.
The average person falls asleep in seven minutes.
The Republic of San Marino is the world's smallest republic (24 sq. miles) and possibly the oldest state in Europe (founded 4th century AD, according to tradition.)
Reversing Falls is in Canada, where the St. John River flows into the Bay of Fundy at St. John, New Brunswick. The rapids at this juncture flows normally at low tide, backwards at high tide. Between tides there is a 15-minute period in which the river is placid and boaters sail by very quickly.
Cats urine glows under a black-light!
The star Alpha Herculis is so big that 25 of our entire solar system would have to be placed end to end to equal the star's diameter.
A squirrel lives about 9 years.