Ancient giant that never shrank: Study shows Anacondas have been massive for 12 million years Times of IndiaAnacondas became massive 12 million years ago — and it worked so well, they haven’t changed size since Live ScienceBones of giant anacondas found in Venezuela. Here’s what scientists discovered when they pieced them together BBC Wildlife MagazineFossils from Venezuela Reveal Early Origin of Gigantism in Anacondas Sci.NewsFossils reveal anaconda snakes have been giants for millions of years BBC
