A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
All 13 minerals necessary for human life can be found in alcohol beverages.
282
The human brain is more active during sleep than during the day.
28
Enamel is hardest substance in the human body.
61
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Your heart will pump about 212 million liters in its lifetime.
26
On average, there's 100 billion neurons in the human brain.
83