Pain occurs when sounds are above 130 db.
123
Only humans shed emotional tears.
331
Yawns are more contagious among people with closer relationships.
163
The human brain uses approximately as much energy as a 10 watt light bulb.
120
Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191