Feathers, essential for thermoregulation, flight, and communication in birds, originate from simple appendages known as proto ...

First came simple filaments. Later, different lineages of theropods evolved various kinds of feathers, some resembling the fluffy down on birds today, some having symmetrically arranged barbs.

Explore the fascinating world of dinosaur feathers and their evolution through groundbreaking research on chicken embryos.

than it is to tear down a load-bearing wall and rebuild it into something new. Some more recently-evolved feather adaptations, like the asymmetry in the flight feathers that allows birds to fly ...

At the 12th day of incubation, feather buds exhibit longitudinal domains of cell density that correspond to the barbs of the future down feather.