The sky is blue because air molecules in the air scatter blue light from the sun more than they scatter red light.
The Chinese failed to foresee that the European expansion would rival their rise because the Chinese did not see the importance of voyages across oceans. The Europeans were out to discover new lands, resources and colonies. The Chinese were thinking about how to bring together their nomads.
"The basic concept is to provide them all their comparative education, where they are able to decide for themselves what is right and what is wrong, that whatever was told to them previously is not true," Pakistani Col. Iman Bilal said. "It is not all about being radical. It is about being a decent human being first."
12 inches=1 foot is the answer I believe.