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Your stomach acid is stronger than you think - According to a study, your stomach acid is corrosive enough to dissolve razor blades.

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You blink, you rest - Eye blinks are not just a way to lubricate your eyes. They're also used to give your brain a rest from whatever you're paying attention to.

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You have more than five senses - Humans have more than the basic five senses—touch, sight, hearing, smell, and taste. We also have proprioception (sense of space), nociception (sense of pain), equilibrioception (sense of balance), and many others.

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Your hair likes to sleep too - Your hair follicles contain genes that track your body clock.

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Your small intestine is four times your size - Your small intestine is on average about 20 ft (6 m) long, though it can be longer. This makes it approximately four times as long as an average-sized human.

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Your butt is your largest muscle - Your gluteus maximus is your largest and heaviest muscle.

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Bacteria in your mouth - You have more bacteria in your mouth than the number of people on Earth!

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Nails grow faster than ever - Nails grow faster than they used to in previous generations. The reason is apparently because our diets are now richer in protein.

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Earwax is good - Earwax cleans, lubricates, and protects your ears. While excess earwax can be a problem, it's up to a physician to assess whether or not you need to get earwax removed.

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Hair can...taste - Our lungs and respiratory tract have cilia, which is similar to hair.  Cilia can actually taste bitterness, so it can get rid of potentially harmful bodies.

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Feet are complicated - Each foot has 26 bones. And if that wasn't enough, your foot and ankle also have 33 joints and more than 100 muscles, ligaments, and tendons.

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Strong pinkie - Your pinkie is stronger than you might think. In fact, a great part of your grip strength comes from your ulnar fingers.

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Sneezes sound different around the world - The sound we make when we sneeze varies, depending on our language.

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Give your brain a deep breath - According to a study, yawning cools down our brains.

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You can’t tickle yourself - There's two parts of the brain involved in how you respond to tickling. These two brain regions are less active when you try to tickle yourself, so your body's response is different.

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Big eyes can affect vision - There is a link between big eyes and being nearsighted. 

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If you're hairy, you might be smarter - There seems to be a relationship between hairiness in males and IQ. But don't worry if you're not hairy at all. Albert Einstein had no body hair either and he was pretty intelligent!

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Your hair can interact with the environment - A study found that scalp oils absorb ozone.

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We're the only animals that cry as an emotional response - Many animals produce tears to lubricate their eyes, but we're the only species to weep as an emotional response.

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You start losing your taste as you age - Your sense of taste decreases as you age. As you get older, taste buds on your tongue take longer to regenerate.

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Sneezes can travel really far - A sneeze can travel as far as 20 ft (6 m).

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Your posture affects your memory - Your body position affects your memory, mood, and confidence. A good posture can also help with digestion and reduce headaches.

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Jamais vu - Jamais vu is the opposite of déjà vu. This is when someone has experienced a situation before, but it feels like it's the first time they're experiencing it.

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Your DNA is really long - If all the cells in your DNA were uncoiled, they would stretch out for approximately 10 billion miles (16 billion km).

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Your body renews itself - Your body rejuvenates itself. This happens at different paces. It takes about 10 years for your skeleton, and anywhere from two to four weeks for your skin.

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Saliva - The average saliva flow rate is around 30 ml per hour. That's enough to fill a wine bottle a day.

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Ears and nose get bigger as you age - Contrary to popular belief, the cartilage on your nose and ears doesn't continue to grow forever. It's gravity that makes them bigger as you age.

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Super femur - The femur is the largest and strongest bone in your body. In fact, it's so strong that it can support about 30 times the weight of the human body!

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Night owls -

A study suggests that night owls might have a higher IQ than early birds.

See also: Bizarre medical facts you won’t believe are true

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