25 Unusual Facts About Human Body (2 of 5)

6. Our brain uses up about 20% of our oxygen and calories to function.

7. We’ve been told before that 75% of our body is made of water, but our brain actually contains even more. Our brain consists of 80% water.

8. Except for identical twins, every person on Earth has a unique smell.

9. Higher IQ means that you dream more.

10. Funny enough, we’re actually 1cm shorter at night than over the course of the day. The reason that happens is because the cartilage between our bones compresses during the day.