Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
On average, there's 100 billion neurons in the human brain.
83
By weight, Bone is five times stronger than steel.
417
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
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
160
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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