Our brains have a negativity bias and will remember bad memories more than good ones.
15
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
You forget 90% of your dreams.
256
The world's shortest man measures only 21.5 inches.
73
Your fingernails grow faster in summer.
744
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
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
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13