The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
The strangers in your dreams are actually people that you've seen in real life.
50
There is a persistent storm in Venezuela that produces lightning 140 to 160 nights a year, 10 hours per day and up to 280 times per hour and has been going since at least the 16th century.
25
There are so many kinds of apples that if you ate a new one everyday, it would take over 20 years to try them all.
34
Cows can sleep standing up, but they can only dream lying down.
745
A cow produces around 200,000 glasses of milk in her lifetime.
373