Also interested in unexpected facts about lawn grass.
Next time please leave your rhetorical/psychological tricks at the door. Betting who will post the best answer is unnecessary, and betting for AskHistorians on AskHistorians while betting for AskScience on AskScience borders on trolling, in my opinion.
hi! lawns are a curiously popular question around here - not discouraging more responses, but you'll find some info in the FAQ (link on sidebar):