The blue whale (Balaenoptera musculus) holds the title of the largest animal to have ever lived on Earth. But what truly sets this magnificent marine giant apart is its astonishing heart—an organ so massive that it weighs as much as a grand piano and is powerful enough to pump 60 gallons of blood per beat. A Heart as Heavy as a Baby Elephant The blue whale’s heart weighs … [Read more...] about The Mighty Beater: A Look at a Blue Whale’s 181 kg Heart