In fact, the coal mine ranks as one of the best fossil sites in the world, providing a window into a tropical rain forest from 60 million years ago. Scientists almost missed the fossils at Cerrejón - until an undergraduate noticed a surprising number of sandstone impressions of fossil leaves. His discovery led to an expedition that found multiple new species, including the largest snake in history.
A Horror From the Past: Titanoboa, That Made the Whole World Tremble