1) A big list of unsolved problems. Doesn’t seeing them like that make you want to solve them just to check them off, forgetting the benefits to humanity and the Nobel prize?
2) A debate over complicated, abstract ideas carried out by hundreds of people over decades. Sound hard to understand? Its not so bad if you just look at the map. I had this debate-mapping idea myself but had not done anything with it; I’d like to see lots more of these done, in a slightly different format.
3) According to Time, Rumsfeld failed at counter-insurgency not because it was so inherently difficult but because he simply wasn’t trying very hard. This seems shocking but based on other things I’ve read it is certainly plausible and probably true.
4) Dredge the entirety of New York Harbor. You’ll be rich, an environmental hero, and solve a lot of lingering mysteries.
Pursuit of Truthiness 