It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
The human brain uses approximately as much energy as a 10 watt light bulb.
120
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
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
