These are less expensive and more easily laundered than natural down or feathers.

It's this hair that's above the eyes, and below it it's longer.

We called this bird Sinornis. It's a little bit more advanced than Archaeopteryx, and if you go to different layers, you find things that are less advanced than Archaeopteryx, and every grade in between, so that if you find something today, we're usually splitting hairs or, more appropriately, feathers as to decide whether it's actually a non avian or an avian.