Your fingernails grow faster in summer.
744
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
The human brain doesn't stop developing until about 25 years old.
102
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Only humans shed emotional tears.
331
Pain occurs when sounds are above 130 db.
124