It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Males sweat 40% more than females.
104
Infants spend more time dreaming than adults do.
102
Sleeping on the job is acceptable in Japan. It is viewed as exhaustion from working hard. Some people fake it to look committed to their job.
57
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
During an average lifetime, a man will spend 3,350 hours removing 8.4 meters of stubble.
52
More boys than girls are born during the day; more girls are born at night.
120
