It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Babies' eyes do not produce tears until the baby is approximately six to eight weeks old.
58
Every workday, 6.7 million people commute to Manhattan!
26
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
The leading cause of poisoning for children under the age of six in the home is liquid dish soap.
42
Most people smile when they are frustrated, according to a study.
15
