You forget 90% of your dreams.
256
The human sigh acts as a physiological reset button.
23
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Enamel is hardest substance in the human body.
61
Your fingernails grow faster in summer.
744
Your heart will pump about 212 million liters in its lifetime.
26
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11