The human body is an incredibly complex and intricate system and it still baffles researchers regularly despite thousands of years of medical knowledge. As a result, it shouldn't be a surprise that even body parts we deal with everyday have unexpected facts and explanations behind them.
Here are 100 wacky facts about the human body:
1. The brain is more active at night than during the day. Scientists don't know yet why this is.

2. The higher your IQ, the more you dream.

3. Facial hair grows faster than any other hair on the body.

4. The nail on the middle finger grows faster than the other fingernails.

5. Fingernails grow nearly four times faster than toe nails.

6. The lifespan of a human hair is 3 to 7 years on average.

7. The acid in your stomach is strong enough to dissolve zinc. It doesn't destroy the stomach because because the stomach walls constantly renews itself.

8. Women's hearts beat faster than men's.

9. Women blink twice as many times as men do.

10. Women are born better smellers than men and remain better smellers over life.

11. Men burn fat faster than women by a rate of about 50 calories a day.

12. Men get hiccups more often than women.

13. A man has approximately 6.8 litres of blood in the body while women have approximately 5 litres.

14. The largest cell in the body is the female egg and the smallest is the male sperm.

15. During your lifetime, you will produce enough saliva to fill two swimming pools.

16. Babies are always born with blue eyes. The melanin in their eyes needs time to be fully deposited or to be darkened by ultraviolet light to reveal the baby's true eye color.

17. Men have erections every hour to hour and a half during sleep. This is because the combination of blood circulation and testerone production can cause erections during sleep and are a necessary part of REM sleep.

18. After eating too much, your hearing is less sharp.

19. If your saliva cannot dissolve or mix with food, you will not be able to taste that food (try tasting something after drying off your tongue)

20. Noise causes the pupils of your eyes to dilate. Even very small noises can do this.

21. Everyone has a unique smell, unique finger print and unique tongue print.

22. By age 60, most people will have lost half their taste buds.

23. Your eyes remain the same size after birth but your nose and ears never stop growing.

24. A simple, moderately severe sunburn burns the blood vessels extensively.

25. We are about 1cm taller in the mornings than in the evenings.

26. The strongest muscle in the body is the human tongue.

27. The hardest bone in the human body is the jaw bone.

28. The hands and feet contains almost half of the total bones in the human body.

29. About 32 million bacteria call every inch of your skin home, but they are mostly harmless and some of them are even helpful.

30. Humans shed and regrow outer skin every 27 days.

31. Three hundred million cells die in the human body every minute and everyday and adult produces 300 billion new cells.

32. The colder the room you sleep, the higher the chances are that you would get a nightmare.

33. Humans are the only species that produce emotional tears.

34. All babies are color blind at birth, they see only black and white.

35. The only part of your body that has no blood supply is the cornea in the eye. It gets its oxygen directly from air.

36. A normal human being can survive 20 days without eating but can survive only 2 days without drinking.

37. It is impossible to kill yourself by choking yourself with your hands.

38. Everybody has one strong eye and one weak eye.

39. Your skeleton keeps renewing itself every ten years which means that every ten years you get a new skeleton.

40. The human feet have 500,000 sweat glands and can produce more than a pint of sweat a day.

I had to divide the 40 points into two seperate posts to avoid getting banned by pyguru for posting spam.

First to comment, yaayyy!!!

Interesting facts. I always knew the smell sensitivity between men and women are different. Must be a trait to protect our young. Also women are better at colors.

Wow! So my body is capable of these?
God is great.

Observed number 38 lately.

lovely

Interesting!!
I just had a shallow sleep last nite cause of dream...reading this,i notice the room was very cool.

Anyway,i don't agree with some of the points.

And some are really funny

fellis: First to comment, yaayyy!!!

you don't know how to count again...you're second

17. Men have erections every hour to hour and a half during sleep. This is because the combination of blood circulation and testerone production can cause erections during sleep and are a necessary part of REM sleep.

lol

baby_123: Interesting facts. I always knew the smell sensitivity between men and women are different. Must be a trait to protect our young. Also women are better at colors.

Women evolved to have a better sense of smell to sniff out genetic deficiencies in a potential mate, since they had lesser chances of passing on their genes, it was more crucial to them to make sure that whatever partner they mated with was as satisfactory as possible. Women are also better with colors like you said. I am not sure what the reason for this is though I read somewhere that it helped with detecting poisonous fruits and plants (by their colours) while gathering food in the wild. Women mostly gathered food while men hunted.

centje: you don't know how to count again...you're second

Am actually first and second.
Double celebration for me

fellis:
Am actually first and second.
Double celebration for me

there're three fellis,one is female the other is male while the third has no gender. The male was first while you were second...next time count well

Fellis and evolution...should i open a thread on evolution lets discuss?

^Do you want a debate?

fellis: ^Do you want a debate?

debate!!
Anyway,let's give it a shot

centje: debate!!

Why the surprise? What exactly did you mean when you said 'discuss'?

fellis:
Why the surprise? What exactly did you mean when you said 'discuss'?

the debate appeared too formal.

centje: the debate appeared too formal.

So sorry centje but I think we are derailing the thread
Just hold the thought on the evolution thread for now, maybe it will happen sometime in the future. Thanks

fellis:
So sorry centje but I think we are derailing the thread
Just hold the thought on the evolution thread for now, maybe it will happen sometime in the future. Thanks

yeah,we are.

fellis: 17. Men have erections every
hour to hour and a half
during sleep. This is because
the combination of blood
circulation and testerone
production can cause
erections during sleep and are
a necessary part of REM sleep.

we don hear...

baby_123: Interesting facts. I always knew the smell sensitivity between men and women are different. Must be a trait to protect our young. Also women are better at colors.

you are so correct but his explanation isn't. I wonder wen picking fruits makes some1 to be better at colour detection

fellis:
Women evolved to have a better sense of smell to sniff out genetic deficiencies in a potential mate, since they had lesser chances of passing on their genes, it was more crucial to them to make sure that whatever partner they mated with was as satisfactory as possible. Women are also better with colors like you said. I am not sure what the reason for this is though I read somewhere that it helped with detecting poisonous fruits and plants (by their colours) while gathering food in the wild. Women mostly gathered food while men hunted.

i cant say d reason precisely but it has to do with d fact that women can never be colour blind, because it's a sex-linked character found in d Y-chromosome. Men have only d Y-chromosome while women have X and Y chromosome thereby making many men colour blind.... Am colour blind, i can only identify colours wen they are sharply contrasting each other.. E.g i cannot differentiat btw any blue, green, purple, violet, indigo or red and pink or yellow and orange- it can be very frustrating... So watever reason, it gat to d with d fact that colour blindness is associated to men only....

Les: .... Men have only d Y-chromosome while women have X and Y chromosome thereby making many men colour blind....

^^
Wrong. In more ways than one. A humanbeing with 'YY' sex chromosomes would be neither male nor female... a freak of nature.

Sex chromosomes in males - 'XY'; in females - 'XX'.

kay9:
^^
Wrong. In more ways than one. A humanbeing with 'YY' sex chromosomes would be neither male nor female... a freak of nature.

Sex chromosomes in males - 'XY'; in females - 'XX'.

I didn't read biology and I have an idea of wat am trying to say and u've corrected me and thanks for that. Am colour blind and d little I read about it, it's found in males only because it's found in d Y chromosome of a thing... And not in women because they dont have y chromosome, abi? So u are correct, thanks...

^^No skin pain.

Les: I didn't read biology and I have an idea of wat am trying to say and u've corrected me and thanks for that. Am colour blind and d little I read about it, it's found in males only because it's found in d Y chromosome of a thing... And not in women because they dont have y chromosome, abi? So u are correct, thanks...

It's actually found in the X chromomsome and the not the Y. Furthermore, women can and do have the disorder, though its admittedly far more common in males. The reason is that being a sex-linked recessive gene, carried only by the X-chromosome, a woman must get copies from both parents to be colourblind, unlike the man who needs just one copy.

@OP, quite interesting

fellis:
Women evolved to have a better sense of smell to sniff out genetic deficiencies in a potential mate, since they had lesser chances of passing on their genes, it was more crucial to them to make sure that whatever partner they mated with was as satisfactory as possible. Women are also better with colors like you said. I am not sure what the reason for this is though I read somewhere that it helped with detecting poisonous fruits and plants (by their colours) while gathering food in the wild. Women mostly gathered food while men hunted.

Yeah, I think I've read something of that nature. Generally, perception wise - smell, taste, sight - women are known to be better and keener in picking them up. Men are better at analyzing ie after the info has been gathered..

plendil: @OP, quite interesting



Yeah, I think I've read something of that nature. Generally, perception wise - smell, taste, sight - women are known to be better and keener in picking them up. Men are better at analyzing ie after the info has been gathered..

Maybe you're right. But i have a question... How come the best fragrance connoisseurs (smell), oenophilists (smell, taste), chefs (taste, smell), and fashion designers (sight) in the world are all men?

but is unfortunate they cant smell them selves.

kay9:

Maybe you're right. But i have a question... How come the best fragrance connoisseurs (smell), oenophilists (smell, taste), chefs (taste, smell), and fashion designers (sight) in the world are all men?

Not sure what the reason for this is but I think a contributing factor is that men show more interest in doing these things than women so these fields end up having more male workers than females.

Sunymoore: but is unfortunate they cant smell them selves.

True. Humans can't smell themselves, I wonder why.
Let me check.

fellis:

Not sure what the reason for this is but I think a contributing factor is that men show more interest in doing these things than women so these fields end up having more male workers than females.

''Show more interest''? Hmm. You know thats debatable, right?

fellis: Humans can't smell themselves, I wonder why.
Let me check.

Very funny., lol...
Umm, are you done checking? I'd like to help...

kay9:

''Show more interest''? Hmm. You know thats debatable, right?

Very funny., lol...
Umm, are you done checking? I'd like to help...

@bold,Is it debateable? What do you think the real reason is?

I checked google for why people can't smell themselves and the best answer I could find was that people get used to their own smells and stop noticing that it is there.