Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
Cows can sleep standing up, but they can only dream lying down.
745
If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
18
Your thumb is about the same size as your nose.
124
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13