The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
You forget 90% of your dreams.
256
The strangers in your dreams are actually people that you've seen in real life.
50
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31
Cows can sleep standing up, but they can only dream lying down.
745