North korea

Solar power:The energy of the sun

To create light energy from the sun:The Core: The core of the Sun is the region that extends from the center to about 20–25% of the solar radius. It is here, in the core, where energy is produced by hydrogen atoms (H) being converted into molecules of helium (He).

10 facts about the human body

1. Your mouth produces about one litre of saliva each day!

2. Your brain is sometimes more active when you’re asleep than
when you’re awake.

3. Laid end to end, an adult’s blood vessels could circle
Earth’s equator four times!

4. The word “muscle” comes from Latin term meaning “little mouse“,
which is what Ancient Romans thought flexed bicep muscles resembled.

5. Bodies give off a tiny amount of light that’s too weak for the eye to see.

6. The average person has 67 different species of bacteria in their belly button.

7. You lose about 4kg of skin cells every year!

8. Babies don’t shed tears until they’re at least one month old.

9. Information zooms along nerves at about 400kmph!

10. The human heart beats more than three billion times in an average lifespan.