The average amount of time a woman can keep a secret is 47 hours and 15 minutes.
Every so often chucks of ice fall from the clear blue sky, some weighing as much as 200 lbs. No one is sure why.
Rats multiply so quickly that in 18 months, two rats could have over a million descendants.
At the height of its power (400 BC) the Greek city of Sparta had 500,000 slaves and only 25,000 citizens.
A snail can sleep for 3 years.
In the late 19th century, millions of human mummies were used as fuel for locomotives in Egypt where wood and coal was scarce, but mummies were plentiful.
You're born with 300 bones, but when you get to be an adult, you only have 206.