10 Crazy facts about the human body

1. The human tongue is the only muscle in your body that is not connected at both ends
2. An average person touches their face 19 times in one hour.
3. Approximately 85% of the human brain is made up of water
4. Your brain is more active when you are asleep than when you're awake.
5. The smarter you are, the more you dream
6. The brain operates on the same amount of power as a 10-watt light bulb
7. The brain cannot feel pain.
8. If you eat too much, your hearing isn't that sharp.
9. By the age of 60, you will have lost half of your taste buds.
10. It's impossible to tickle yourself.

Microscopes

Microscopes come in many different sizes. Microscopes have multiple different parts. One of the parts is the slide. Slides come in many different sizes. The smallest thing that we can see with a microscope is 500  nanometers.