10 interesting scientific cold knowledge, how much do you know?

1. When going down elevator, weight of body seems to be lighter.

2. Diamonds are not as rare as you might think.

3. Why does hair turn gray with age? Our hair has a substance called melanin, more melanin it contains, darker hair will be. And if there is little melanin, hair will turn yellow or white. When people reach old age, various functions of body gradually decrease, and production of pigment becomes less and less, so hair gradually becomes white!

4. Why don't ostriches fly? Like an ostrich with a huge body, but they can't fly into sky! It's not that their wings don't work, it's that their feathers are too soft and their wings are too small to fly. In addition, ostrich has underdeveloped muscles and a flat sternum, which is not conducive to flight. Ostriches live in Africa. Since they lived in desert areas for a long time, their bodies gradually evolved into what they are today to adapt to environment.

5. Forty-seven years ago, man first set foot on moon, and this footprint may remain there in a million years. This is because there is no atmosphere on moon, no wind or water to wash away imprints on surface of moon.

6. When a superstar explodes, it eventually sinks down to core and becomes a neutron star. Neutron stars are so dense that a teaspoon of them weighs more than Mount Everest. The explosion could increase rotational speed of a neutron star to an incredible 600 revolutions per second.

7. The amount of fart you fart each day is equivalent to gas it takes to fill a balloon.

8. Your eye muscles move up to 100,000 times a day.

9. Why do sunflowers always bloom towards sun? The stem under disk of a sunflower contains a substance called "vegetable auxin". This substance has function of accelerating reproduction, but it has an anti-rotation property: every time it encounters light, it goes to side that is not lit. So when sun rises, sunflower stem immediately hides in direction of backlight, and it seems that whole plant is leaning towards sun.

10. The seahorse was born from womb of father? Females breed in almost all animals, but seahorses are unusual in that they are born males. The male seahorse has an egg-hatching sac on its abdomen that resembles a kangaroo's "brood pouch", and female seahorse releases eggs into male seahorse's hatching sac. The male seahorse then takes over responsibility of breeding, and after about three weeks, a baby seahorse hatches from father's body.

Source: Internet, copyright reserved by original author