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Our brain weighs just 2% of our body weight, yet consumes 20% of our energy requirements. Even when not active, it will burn roughly 400 calories every day.
The most efficient brains burn the least calories. Efficient brains can save a task quickly and then go into a kind of standby mode.
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Our gut ecosystem is becoming infertile for a multitude of reasons. Overuse fattening up farmed animals, C-sections (in which the baby fails to get a wash of microbes), and our own misuse of antibiotics all seem to contribute.
Nearly 40% of people who were once very fit got ill with diabetes, chronic hypertension, or cardiovascular disease.
Our vestibular system is responsible for balance. A gel is located inside our ears and tells our brain if we are going right or left.
Our saliva produces a natural painkiller, opiorphin. It is six times more potent than morphine, but we produce minimal amounts of it. It is an essential biological feature that helps us manage pain.
Children go through puberty sooner due to improved nutrition. However, young girls are now menstruating as early as seven. There is also a known link between excess estrogen and cancer later in life. That means you solve one problem like malnutrition but then another problem may appear.
Only our brain — an organ that itself cannot feel pain — can feel pain. Headaches are not even our brain hurting.
10% - 40% of the world's populations suffer an allergy to something. The richer the nation, the more allergies its citizens have.
In 1915, an average American spent half of their weekly income on food.
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