Platypus fur has a surprising feature seen only in bird feathers

Recent research reveals that platypus fur possesses a unique feature typically associated with bird feathers: hollow melanosomes. These pigment-bearing structures, commonly found in the hair of various animals, have now been identified in the fur of platypuses, marking them as the first known mammals to exhibit this characteristic. This discovery not only enhances our understanding of platypus biology but also underscores the evolutionary connections between mammals and birds.