In both types of feather, the barbules that extend from the barb ramus grow from a single layer of cells, called the barbule plate, on the periphery of the barb ridge.
How all these creatures survived those conditions was, Dr Druckenmiller suggests, a consequence of dinosaurs' warmbloodedness and the downy feathers many of them are now known to have sported.
Because we know what the feathers of living birds look like, modern technology combined with the exceedingly rare fossils with preserved remains of fuzzy feathers give us a glimpse of the real colors of extinct dinosaurs.
They've found that a lot of dinosaurs, including Velociraptor, probably had feathers, meaning that certain films might not be so biologically accurate.
She reached again into her crocodile bag, and drew out a long acid-green quill and a roll of parchment, which she stretched out between them on a crate of Mrs. Scower's all-purpose magical mess-remover.