The world's youngest parents were 8 and 9 and lived in China in 1910.
130
Up to the age of six or seven months a child can breathe and swallow at the same time. An adult cannot do this.
165
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
You can only remember 4 things at a time.
31
Intelligent people have more zinc and copper in their hair.
233
Forty percent of Americans have never visited a dentist.
33
The offspring of two sets of identical twins are legally cousins but genetically siblings.
63