dinosaur feathers in amber! w00t!
Originally shared by Yonatan Zunger
What you see in the picture below are dinosaur feathers.
This is a part of the tail of a young coelurosaur, a member of the group of dinosaurs including both modern birds and T. Rex. It lived in the mid-Cretaceous, around 99 million years ago, in what is today northern Myanmar; the fine structures you see in this picture (and which you can see in more detail at the link below, and even more in the paper) are early feathers, chestnut-brown on the top and white on the underside. These early feathers (and the tail going with them) would not have allowed flight; they may have been used as plumage, or for temperature regulation (like fur).
Above the tail, you can see a Cretaceous ant, showing that some things never change.
If you want to learn more, you can read the entire paper at http://www.cell.com/current-biology/fulltext/S0960-9822(16)31193-9 , and the supplementary information at http://www.cell.com/cms/attachment/2075122016/2069586832/mmc1.pdf ; each of those contains many more pictures, together with all sorts of other things we have learned about this creature.
But yes, it is quite clear that (at least some) dinosaurs had feathers.
h/t Kimberly Chapman