The Marvels Of Human Body: Some Lesser Known Facts
We have all been living with ourselves for a while now. We learnt how to do basic tasks when we were toddlers and after that, just take our bodies for granted. It is astonishing to know just how ignorant we are about the greatest machine ever conceived – the human body. Here are some lesser known marvels of human body:
Newborn babies see in black and white!
At birth, your baby sees only in black and white and shades of gray. Nerve cells in their retina and brain that control vision are not fully developed. Also, a newborn infant’s eyes don’t have the ability to accommodate (focus on near objects). So don’t be concerned if your baby doesn’t seem to be “focusing” on objects, including your face. It just takes time.
Despite these visual limitations, studies show that within a few days after birth, infants prefer looking at an image of their mother’s face to that of a stranger.
2. Your stomach acid is even strong enough to dissolve razor blades!
Stomach acid has a pH of 1. This makes it a pretty strong acid. Any thin piece of metal like a razor blade would turn into a liquid slurry within a few hours.
The question is, why doesn’t this super corrosive acid eat through your stomach? The stomach has a thick lining of mucus which protects the tissue. Even if the acid gets through the mucus, the stomach cells are known to regenerate at a very fast rate. So, there really is nothing to worry about!
3. You are taller in the morning than in the evening.
When you crawl out of the sack in the morning you are at your tallest. On average, you are approximately one half inch taller when you wake in the morning, thanks to excess fluid between within your spinal discs. While you are sleeping, these fluids replenish. During the day your body has to deal with the stress of standing, so the discs become compressed and the fluid seeps out. This results in you losing a small amount of extra height.
4. By the age of eighteen your brain stops growing.
From that age forward it begins to lose more than 1,000 brain cells every day. Only two percent of your body weight is occupied by your gray matter, but is uses up to 20% of your overall energy output (it needs carbohydrates). Your brain works continuously and never rests, even when you’re asleep. Aside from producing REM dreams, your brain works overtime to replenish its ability to function normally during your daytime waking hours.
5. We are getting dumber by the generation!
Our brains are getting smaller. Over the past 10-20,000 years, the size of the average human brain has reduced by the size of a tennis ball. We are not getting smarter. Since the Victorian era, average IQs have gone down 1.6 points per decade for a total of 13.35 points. Our attention spans are getting shorter. In 2000, the average attention span was 12 seconds. Now it’s 8 seconds. That’s shorter than the 9-second attention span of the average goldfish.
Here were some marvels of human body, the most spectacular machine ever. Read on here for some crazy facts about science.