On average, there's 100 billion neurons in the human brain.
83
Tigers can see 6 times better at night than humans.
305
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 human eye blinks an average of 4,200,000 times a year.
233
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
The world's shortest man measures only 21.5 inches.
73