I can't think of anything worth adding to Isa's response, incoherent ramble that it is. If only the same were true of the comments section, but alas...a) what Todd X said, b) Anonymous, if you don't see any vegans ...

caused by lack of vitamin c. The explorers ended up with scurvy because fruits and vegetables didn't last very long out on ships with no freezers. No fruits and vegetables, no vitamin c = scurvy. Some of the North American natives taught ...