There’s no doubt you learn a ton of things about the human body in biology class. However, there’s no way you were aware of these 40 surprising facts!
Our fingers allow us to accomplish a ton of stuff. They are also quite sensitive. The proof: if our fingers were the same size as the Earth, we could feel the difference between a vehicle and a house.
Eyes allow humans to see the world. In fact, they’re so effective that if our planet were flat, our eyes could spot the flame of a candle in the night nearly 50 km away.
Of course, we blush when we’re shy or embarrassed. But did you know that we also blush on the inside? When an emotion flushes our cheeks, it has the same effect—inside our stomach!
Being in love is a strong feeling that affects our entire body. For instance, when we’re in love, our brain releases hormones and neurotransmitters similar to those released by amphetamines—a drug that stimulates cerebral activity and leads to decreased hunger and fatigue. Our heart rate can also accelerate and we can become overexcited.
Weightlifters can achieve incredible things thanks to their muscles. Human muscles are extremely strong—more than you might think! To avoid injury and protect our tendons and muscles, our strength is restricted. Yet every now and then, like during an adrenaline rush, this “protection” disappears, allowing us to lift unbelievable loads, such as a vehicle.
Although many animals can run faster than humans, we can pride ourselves on being the best long distance runners on the planet. In prehistoric times, humans could chase their prey for days, until it died of exhaustion.