It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Mushrooms are more closely related to humans than they are to plants.
47
There are about 255 babies born worldwide every minute.
46
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
Your heart will pump about 212 million liters in its lifetime.
26
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.
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