5 amazing facts Round #3 (list)

This is a Round #3 challenge for the Steemians who use the Hive account@esteemapp.
All rules are in a banner on the bottom of a post.

List

1. Lipstick often contains fish scales.
2. Play-Doh was created as a wallpaper cleaner.
3. Without saliva we can't taste food.
4. Marine plants produce 70% of atmosphere's oxygen.
5. You can't count at laud to one billion in one sitting .

My opinion

Anything about lipstick is no surprise to me, they could say it contains nuclear isotopes, no surprise at all.

Play Doh can be useful, but how they did it? It is puzzling!! Walls must looked so nasty after Plasticine cleaning, hehehe.

Saliva needed to taste food must be a reason why at times all food doesn't taste right.

How do you measure 70% of oxygen, what method?

One billion counting, eh, who would even want that?

I will post 5 amazing facts Round # NUMBER (list), and whoever is intrigued, can follow up with 5 amazing facts Round # NUMBER (opinion).

Cover and banner designed by Hive account@aschatria, icon by Hive account@esteemapp.