Why was the chapel the highest room in the castle? Why were peasants forced to bake their bread in the Lord's oven? Why did castle stairs spiral clockwise as they rose?
How do movie producers create rivers, lakes, and oceans in a studio? What is unusual about preparing ice cream in an Antarctic base? Where does snow fall on the Grand Canyon
How many rivets and bolts hold together the wings of a Boeing 777 plane? Why does an astronaut's space suit have a layer of liquid-cooled underwear? Who puts jelly in donuts?