A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
About 3000 years ago, most Egyptians died by the time they were 30!
18
Females learn to talk earlier, use sentences earlier, and learn to read more quickly than males.
119
The average person walks the equivalent of twice around the world in a lifetime
69
On average, a person will spend about five years eating during his or her lifetime.
90
