The human eye blinks an average of 4,200,000 times a year.
233
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Your fingernails grow faster in summer.
744
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The human brain has the capacity to store everything that you experience.
4k
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
You forget 90% of your dreams.
256