Frogs never drink water! They absorb it through their skin.
One day on the Moon lasts for 700 hours, or nearly 30 Earth days.
In one day the heart beats around 100.800 times. It pumps through the blood vessels as much blood as it would take to fill about 170 average bathtubs.
The candle flame is blue at the bottom because of the oxygen intake and yellow at the top because it burns it there.
Scientists claim that every 14 days one language dies. By the end of the 21st century, it is likely that almost half of the approximately 7.000 languages will disappear.
Cleopatra's Needle, which is now located at Central Park in New York was once part of a sundial.
