Why Do Some Organs Come In Pairs? We all have two of certain organs, like kidneys and lungs, but why not multiple hearts, livers or brains? Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts Why Don’t We All Have Cancer? What are Those Things on Airplanes’ Wings? How California’s Drought Affects The World Light seconds, light years, light centuries: How to measure extreme distances The Deepest Hole in the World, And What We’ve Learned From It 5 Unsolved Secret Codes that Will Lead You to Lost Treasures