Wondering why Quora is gaining so much steam? It’s not too complicated: there is a need on the web for a fast way to get answers from experts. Part of the reason this hasn’t been solved yet is that almost every question service eventually folds under its own weight and becomes like Yahoo! Answers where people ask “How are babbys formed”? That said, Reddit has always prided itself on booting/downvoting and blocking non-contributing members, so its community is still smart. And so is its “ask me anything” section – or IAMA as it’s affectionately known by Redditors.