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15 Fun Facts about the Brain

Updated: Aug 21, 2022

Are you familiar with the way your brain works? See how much you already know...and learn some fun facts that you didn't!

The brain is one of the most complex organs of the human body. It is one of the ways we humans process incoming information.

The anatomy and functions of the brain are incredibly unique and fascinating.

The human brain always has shocking revelations and surprises for biologists and scientists. Here are some fun facts that might leave a jaw-dropping impression on you as well!

15 Fun Facts About the Brain

1. Weighing three pounds, the majority portion of the brain is fat (about 60%), making it the fattest organ in the body. With a firm yet jelly-like texture, it makes up about 2% of the body weight. Despite weighing so little, it takes up the most energy in the body, with almost 20 to 25% of the blood going straight to the brain.

2. Sweat can end up shrinking the brain. It is because the brain is primarily composed of water, and dehydration will make it shrink. But how much exactly? Well, a solid 90 minutes of continuous sweating shrinks your brain to the same size as it would after a year of aging. However, this shrinking is temporary, and the brain regains its size after proper hydration.

3. You are seldom "thoughtless." The brain typically creates 48.6 thoughts every minute. And the part of the brain responsible for daydreaming (the default mode network - DNM) remains primarily active. Therefore, daydreaming is way more common than you might imagine!

4. Your brain remains unformed till you’re 25 years old. It develops from back to front, and the structure working on reasoning, the frontal lobe, etc., remains underdeveloped till that age.

5. Your brain can store a significant amount of information and has unlimited capacity.

6. We don't remember things well when we're older, mainly because of the brain's inadequacy to clear out and filter the previous information to sort out the new data. However, we might end up remembering what we seem to have "forgotten" from a long time ago.

7. The brain can communicate information fast. And by fast, according to research, we mean an impressive speed of 268 miles per hour, which is much better than the best computer humanity could create.

8. The brain doesn't die immediately. If the blood supply is cut off, it will take 8 to 10 seconds before it starts fading out. By stopping oxygen, it can last up to the next 5 or 6 minutes at most.

9. The brain is primarily water (almost 2%). Therefore, as little as 2% of dehydration will affect your cognition drastically.

10. We have all heard the myth that you only use 10% of your brain. It's wrong. You use all of your brain in every single task you do, even sleeping.

11. Well, the organ between your ears can light a bulb as well. Thanks to the 23 watts of power our brain generates.

12. Intelligence isn't a work of sizes. A bigger brain doesn't make a more intelligent person. Men, generally, have larger brains, but the size of the hippocampus is more significant in women.

13. Blood and oxygen are the fuels of the brain. The harder you work it out, the greater it will consume. And the consumption can increase up to 50%.

14. Well, none of us can say we control our minds. Because, mostly, we don't. Most of our decisions do not even occur in the conscious part of the mind (which makes about 5% percent of the total brain). If you want to change this consider taking up mindfulness or meditation and see the effects!

15. You have two brains, one in your head and the other in your intestine, both containing neurons.

"The seat of the soul and the control of voluntary movement - in fact, of nervous functions in general, - are to be sought in the heart. The brain is an organ of minor importance."

Aristotle (from De motu animalium, 4th century B.C.)


Apart from being difficult to understand, our brain has the most impressive functions and structures in the human body.

Our fun facts about the brain will definitely provide you with an insight into how your brain rolls and help debunk some of the prevailing myths about the organ.

While these facts may sound surprising, there are many more still unknown to humanity, so…

Stay curious!




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