10 Interesting Science Facts You Don't Know

1) Your eyes take about an hour to get used to the darkness, but after that they become 100,000 times more sensitive to light.

2) In the human digestive system contains enough acid to completely dissolve the iron nail.

3) Your body loses 2.5 million red blood cells every second. Fortunately, at the same time, it creates more of them.

4) The hair on the chin are growing faster than any other part of a man’s body. If he had not shaved in a lifetime, the length of his beard would reach 9 meters.

5) If we combine into one chain out of eyelashes that you lose over a lifetime, it would have reached a length of 30 meters.

6) If all the blood vessels of the human body put together, their length will reach 97,000 kilometers.

7) It turns out that laughter reduces allergic reactions. For example, if you have hay fever, try to laugh about it!

8) When you hold a seashell to the ear to hear the “sound of the sea”, in fact you can hear how your blood runs through the blood vessels of the ear.

9) The world record for breath-holding is 7.5 minutes. Most people cannot breathe only for one minute.

10) It seems that some dreams last forever, but in fact they are continuing a total of only 2-3 seconds. Most people per night sees at least 7 dreams.