If the human eye was a digital camera, it would have 576 megapixels.
25
It takes approximately 12 hours for food to entirely digest.
93
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Obsessive nose picking is called Rhinotillexomania.
101
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Enamel is hardest substance in the human body.
61
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11