It’s Shark Week again. But you already knew that, didn’t you? You’ve seen it mentioned every 30 seconds in your Twitter feed. At least one-quarter of your Facebook friends have been posting incessantly about how psyched they are about it. Every news site on the Internet (including this one, natch) has posted at least a dozen stories alerting you to everything from its marketing potential to the dubiousness of its “documentaries” (fun fact: the 35-foot-long “submarine shark” is not real).