The New "Normal"

It really baffles me how idiotic people supposed, of science think.  This article - Dead zones off Oregon and Washington likely tied to global warming, study says - Los Angeles Times says "Low-oxygen zones off the Northwest coast appear to be the new normal."  Do they not understand that there really is no "normal" when it comes to just about anything.  It was normal when the dinosaurs roamed, then they died out.  Don't they believe in evolution?  Things die, things evolve, but hardly anything stays the same.  The earth and all it's creatures are constantly in flux and changing all the time.  It's Survival of the Fittest.