Bill O’Reilly is curious about how tides work, why we have a moon, and where the sun came from. All of which are deep mysteries for which no answers can be found. Unless you look them up, of course. (When I was an undergraduate, Wikipedia didn’t exist yet, so I had to learn this stuff the old fashioned way — by taking a course in stellar astronomy and one in planetary astronomy).
http://en.wikipedia.org/wiki/Tides
http://en.wikipedia.org/wiki/Moon#Formation
http://en.wikipedia.org/wiki/Giant_impact_hypothesis
http://en.wikipedia.org/wiki/Formation_and_evolution_of_the_Solar_System
http://en.wikipedia.org/wiki/Stellar_evolution
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