The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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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
The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
94
Cows can sleep standing up, but they can only dream lying down.
745
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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The strangers in your dreams are actually people that you've seen in real life.
50