The Outline on /r/AskHistorians
Some people cruise through Wikipedia links like a community car wash, letting the always-churning trivia brushes scrub their worries away, but I want my brain powerwashed by AskHistorians. AskHistorians is a subreddit run by a strict community of historians that don’t tolerate your internet nonsense. You make jokes? You don’t cite your sources? You’re history.