Rihanna was an army cadet in a sub-military programme, before her musical career.
Rabbits often sleep with their eyes open.
Rats multiply so quickly that in 18 months, two rats could have over a million descendants.
Hot water is heavier
than cold water.
In 1974, Kim Il-sung took 1,000 Volvo sedans from Sweden to North Korea and never paid for them.
A flea can jump up to 100 times its height.
Earth is the only planet whose name in English is not derived from a Greco-Roman God.
More people are killed each year from bees than snakes.
The word "queue" is the only word in English that is still pronounced the same way when the last four letters are removed.
There's a self-portrait sculpture made from 9 pints (4.2 liters) of the artist's frozen blood.