Check out this 100-million-year-old fossil. The Scientist reports that it’s a flower known as Tropidogyne pentaptera, preserved in amber from the Cretaceous period. The working hypothesis is that a dinosaur walking through a pine forest may have knocked it loose into a pool of resin, where it became fossilized. Researchers recently published their analysis of this flower and six others with equally impressive preservation in Paleodiversity. Despite the large size of the image you see here, the flowers are quite small, from 3.5 millimeters to 5 millimeters across, and require observation under a light microscope for study.