You forget 90% of your dreams.
256
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
On average a woman has 4 sexual partners in her lifetime.
-143
On average, there's 100 billion neurons in the human brain.
83
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23