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 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
94
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The strangers in your dreams are actually people that you've seen in real life.
50
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
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
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16