Sorry by I don't believe it has anything to do with 'mental intellect' or whatever other labels you want to put on people. It comes down to rudimentary education. If children are taught the fundamentals of science, geography, nature, history etc they have a sound footing for all their knowledge base as they grow up to adulthood.
For example I was taught the basics of astronomy around grade 3 or 4, learning that 9 planets revolve around the sun, the sun is a star, man has walked on the moon, we are in a giant spinning top-like cloud called the Milky Way, etc etc etc. and I guarantee everyone of my generation who went through State school in Australia would have the same knowledge base today. Some of us have used it more than others, but the basic facts were taught in school.
It is unfortunate that other influences come into play such as the dogmatic, brainwashing pressures of creationism and religion, which in my opinion should be banned from all government schools.
Again, it comes down to instilling the fundamentals in basic education. Nothing more.
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