Ninety nine million years ago a dinosaur got its tail stuck in the sap. Then, in 2016, someone noticed some interesting stuff in the amber at a Myanmar amber market. The pictures of dinosaur feathers are great--and they show a flowchart of feather evolution, and where these feathers fit in. So cool.
https://blogs.scientificamerican.com/artful-amoeba/jaw-on-the-floor-entire-chunk-of-feathered-dinosaur-discovered-in-amber/