Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
It is possible for you to survive even after the removal of the spleen, the stomach, one kidney, one lung, 75% of the liver, 80% of the intestines, and almost every organ from the pelvic and groin area.
218
The human brain doesn't stop developing until about 25 years old.
102
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
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
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
The average person's skin weighs twice as much as their brain.
131