A new study has revealed that the microscopic structure of feathers can preserve the colors of birds that lived millions of years ago. The study, published in the journal Nature Communications, found that the fossilized feathers of a 50-million-year-old bird called the Eoconfuciusornis preserved the bird's original iridescent blue color.
The researchers used a technique called scanning electron microscopy (SEM) to examine the fossilized feathers. SEM allows scientists to see the surface of objects in great detail, and the researchers were able to identify the tiny structures on the feathers that produce color.
In the case of the Eoconfuciusornis, the researchers found that the feathers were covered in tiny bumps and ridges. These bumps and ridges scattered light in such a way that it created an iridescent blue color.
The researchers also found that the microscopic structure of feathers can help explain why some birds, such as cassowaries, have a shiny appearance. Cassowaries have feathers that are covered in tiny, hair-like structures. These structures scatter light in all directions, which creates a shiny appearance.
The study has important implications for understanding the evolution of birds and the diversity of their colors. It shows that the microscopic structure of feathers can preserve the colors of birds that lived millions of years ago, and it can help explain why some birds have shiny appearances.
In addition to the Eoconfuciusornis, the researchers also studied the feathers of other fossil birds, including the Archaeopteryx, the oldest known bird, and the Confuciusornis, another early bird. They found that the feathers of these birds also contained microscopic structures that produced color.
The study provides new insights into the evolution of birds and the diversity of their colors. It shows that the microscopic structure of feathers is a key factor in determining the color of birds, and it can help scientists understand how birds have evolved over time.
