So someone posted this a few days after someone posed the same question on Reddit on the 27th Dec. Which is pretty coincidental since Oda posted his chapter revealing the character 'Page One' a few weeks ago as well! Anyways, now every time I see his character, I think of this awfully photoshopped image, haha! I'm pretty sure, like feathers, we would have seen the impressions of hair in fossils, but its funny to imagine!

i.imgur.com/yUfT7EF.png (idk how to post the image outright)