A dinosaur, possibly a young Tyrannosaurus rex, excreted a bird 66 million years ago, and one of its feathers is exquisitely preserved in the fossilised dropping https://www.newscientist.com/article/2588673-exquisite-66-million-year-old-bird-feather-preserved-in-dinosaur-dropping/?utm_term=Autofeed&utm_campaign=echobox&utm_medium=social&utm_source=Twitter#Echobox=1789052616