The human sigh acts as a physiological reset button.
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It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Quality dark chocolate contains flavonoids which help reduced the risk of heart disease.
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Not swinging your arms when you walk increases the effort of walking by 12%, the equivalent of walking 20% faster or carrying a 10 kg backpack.
12
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23