The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Our Right Lungs takes more air than our left lung.
194
Tigers can see 6 times better at night than humans.
305
Your fingernails grow faster in summer.
744
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
If the human eye was a digital camera, it would have 576 megapixels.
25
There are about 255 babies born worldwide every minute.
46
Obsessive nose picking is called Rhinotillexomania.
101