12. The number of cells and bacteria in the human body is approximately the same.
A group of scientists from Israel and Canada came to this conclusion. During their research, they dispelled the myth that the proportion is 10:1. They calculated that an average adult has 30 trillion bacteria and 39 trillion cells.
13. Giraffes and humans have the same number of bones in their necks.
Birds, reptiles, and amphibians have a different number of vertebrae in their neck. For example, a swan can have from 22 to 25 bones. But mammals, like humans and giraffes, have only 7 bones in their neck. The size and the length of the neck don’t change this number.