When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
30
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
94
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
Your heart will pump about 212 million liters in its lifetime.
26
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
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118