oEven in ancient times, people must have thought of stars as Òfires in the skyÓ and wondered: ÒWho lit these fires, and who provided the firewood?Ó
oIn the 1700s came OlberÕs paradox:
nWhy is the sky so dark when in an infinite, eternal universe it ought to be so bright?
nAn early indication that the universe has not always existed.