A physics project to do the next time you have an infinite number of books.

How far can you stack a 'stairway' of books, outwards from the ledge of a table? This is the problem that consumed physicists for over two hundred years. The answer? Forever — if you have enough books. Find out how this paradox gave rise to many ancient structures, and some structures that we can still see today. »1/19/12 5:30pm1/19/12 5:30pm