Yawns are more contagious among people with closer relationships.
163
The human sigh acts as a physiological reset button.
23
Enamel is hardest substance in the human body.
61
Your heart will pump about 212 million liters in its lifetime.
26
Pain occurs when sounds are above 130 db.
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
All 13 minerals necessary for human life can be found in alcohol beverages.
282
Babies crawl an average of 200m a day.
212