My brother Ken: Hey BH, check it out, the sun is setting.
My nephew BH: Why?
Ken: Because our side of the planet is turning away from the sun.
Ken: Um, because of the conservation of angular momentum from the formation of the Earth.
Ken: Uh, because of the gravitational collapse of the pre-solar nebula.
Ken: Einstein’s General Theory of Relativity?
Ken: Hey, do you want a cookie?