Breivik's attacks ignited a debate about the nature of tolerance and democracy in Norway.

BBC: Anders Behring Breivik: Norway court finds him sane

But it seemed particularly tough on the Swedes, who pride themselves on their peaceable nature and tolerance.

ECONOMIST: The rioters did make the leaders look more remote

Plants have long been selected by nature and bred by humans or irradiated to create mutants with enhanced resistance or tolerance to external threats to their survival and productivity.

FORBES: Back To The Future: Let's Reverse 25 Years Of Flawed Agbiotech Regulation