On average, there's 100 billion neurons in the human brain.
83
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
The human sigh acts as a physiological reset button.
23
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Pain occurs when sounds are above 130 db.
123
Enamel is hardest substance in the human body.
61
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191