mathematics, why does one plus one equal two?
mechanics, how do pistons work?
navigation, why did the plane change course many times while flying from L.A. to China?
nautical astronomy, How did the Polynesians in canoes get to the Hawaii’s Islands in 300-600 AD.?
heat, why is my home warm and cold according to my wishes?
steam, what causes the whistle in my teakettle?
electricity, why can I have lights at night or not?
I don’t know the answers to some of these questions, however, the answers on one continent are the same as on all the other continents or at sea or in space.