Let's not talk about how many ~ahem~ clan folks were sacrificed determining which almond trees weren't loaded with cyanide.Actually what I'm always curious about are things like kidney beans, which need to be soaked for many hours and then boiled for an extended period to destroy the toxins they contain before you can safely eat them: who the hell worked out what you had to do, and why did they keep trying rather than just deciding they were poisonous and avoiding them the first time they made everyone ill?