Blue and Green: Noticed any crazy weather lately? You may be feeling the return of El Nio. Scientists announced yesterday that one of the most potent influences on global weather patterns is back after a 5-year hiatus. This article was written by Michael Reilly and first published on Timeline.com. Get Timeline App. A robust El Nio spells a muted hurricane season for the eastern US, and much-needed rains for the west, which has been parched for years. But other parts of the world are likely to face drought, wildfires...