Alteration of the expression of the co-called 'Sonic Hedgehog' gene can transform feet scale and wing feathers. While a transient over-expression of the gene can permanently turn feet scales into ...

There are five primary types (bottom row) of pigment-filled sacks, called melanosomes, within the nanostructure (left)` of iridescent feathers ... Microscope images adapted from Durrer (1977).

Ancient lice ate dinosaur feathers, similar to how modern-day lice eat bird feathers, according to a study published yesterday (December 10) in Nature Communications. Researchers led by Taiping Gao ...