From boing boing:
The Marginal Revolution blog poses the musical question, “If you were transported back to the middle ages, what would be the top strategy for thriving?” Given that most of us can’t make gunpowder from scratch (and don’t have up-to-date smallpox vaccinations), dreams of becoming a technological pre-Enlightenment billionaire guru are probably not realistic (stipulating that “realistic” is probably not a good word to use in respect of responses to hypothetical time-travel questions).
Some really great responses at MR, too.
