Well, we call them "birds" these days. It seems that, unlike everything else, they kept getting smaller.
Oh, and if you're wondering about feathers, well -- they were pretty common among dinosaurs:
The article is worth reading, although I found it a little dry. But there's a video for those with short attention spans:
Our research shows that the ancestors of birds were the only lineage of dinosaurs to continually shrink in size for an extended period of time (at least 50 million years, and perhaps twice as long). They were also the fastest-evolving lineage of dinosaurs.
Oh, and if you're wondering about feathers, well -- they were pretty common among dinosaurs:
We now know that many bipedal, meat-eating dinosaurs (theropods) – including relatives of T. rex and Velociraptor – were adorned with a variety of feathers. They were preserved in such detail in fine volcanic ash that often even their colours can be reconstructed. Plumage might have even been present in all dinosaurs.
The article is worth reading, although I found it a little dry. But there's a video for those with short attention spans:
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