18 May 2010: Morning By The Morning News — 18 May 2010 Fireballs inside miniature universe suggest muons explain why we exist. On the rise of middle powers: U.S. caught off-guard by Brazil-Turkey alliance. France says swap of academic for man who killed former Iranian prime minister isn't quid pro quo. South Korea to inform the U.N. Security Council this week about its inquiry into March's frigate sinking. Op: This isn't the end of the "too big to fail" era; it's the beginning. Earth is not the center of the universe, mass extinction looms, and other things we wish science hadn't discovered. Reasons to visit Iceland right now--an account of entering the ash. Caffeine beats placebos and naps in reducing errors and improving performance among shift workers. Instapaper: Why travel makes you smarter: distance and difference. QVC succeeds by telling intimate stories repeatedly. New divorce numbers reveal low-income couples most likely to split; "50 percent of marriages end in divorce" is false. Audio: Radiolab does tumors. Chris Myers: Tennesseeans are tougher, more American than Katrina victims or immigrants. Bryson on candles: "The amount of illumination one gave oneself was a telling indicator of status." Examples of how not to talk to American Apparel models. Video: Meet the curators behind online obsessions, with TMN's Kevin Guilfoile.