In his study of the quadrature and duplication-problems, Hippocrates contributed much to the geometry of the circle.

It's rare that you see an artist in his 30s or 40s able to really contribute something amazing.

What is the purpose of houses? It is to protect us from the wind and cold of winter, the heat and rain of summer, and to keep out robbers and thieves. Once these ends have been secured, that is all. Whatever does not contribute to these ends should be eliminated.[6]