Weird actualities

Hi guys i m back with another strange facts,so lets go!!

1)adidas is a first company started making shoes from plastic

2)Our body contains 5.5 liters of total blood.

3)In today's era, the mushrooms are very small, but in the days of dinosaurs , the mushrooms was a big like tree

4)In numerical numbers only letter "A" does not comes in thousand.means  "A" letter does not come from 0 to 999