The largest cell in the human body is the female egg and the smallest is the male sperm.
682
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Human hair and fingernails continue to grow after death.
7
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, there's 100 billion neurons in the human brain.
83
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The average person will go on a date at least 100 times before they finally marry.
33