Scientists at the Chicago Open Air Museum have made an intriguing discovery within their collection of horned fossils, which are roughly the size of pigeons. These fossils reveal a surprising array of features reminiscent of bird feathers, hands, feet, and heads.
This find is said to belong to one of the best-preserved specimens out of the 14 known fossils that have been identified since 1861. The original horn fossils exhibited a mix of reptilian and avian traits, lending some support to Darwin’s theory of evolution, which suggests that birds descended from dinosaurs.
New advancements in research, utilizing UV light and CT scans, have unveiled additional details hidden within the rock. This study offers new insights into creatures that soared through the skies during the Jurassic period, around 150 million years ago.
Anatomical features imply that Archeopteryx, a notable specimen, may have been capable of flight, although it likely spent considerable time on the ground and could have climbed trees as well.
Interestingly, these fossils show specialized feathers on the wings, known as contingent feathers, which are connected to specific bones. This suggests that evolutionary adaptations for flight developed over time in response to functional needs.
However, researchers note that the feathered dinosaurs did not possess these wings in the same way. The findings indicate that modern birds have specific evolutionary traits that facilitate flight.
“To generate lift, the surface must seamlessly connect with the body,” explained paleontologist Jingmai O’Connor from the Field Museum. “This observation supports the idea that flight adaptations have evolved, as seen in Archeopteryx.”
Despite over 160 years of study, some fundamental questions regarding Archeopteryx, such as its classification as a bird and its flight capabilities, still linger. The presence of certain feathers lends credence to the belief that it is, indeed, both.
When excavated, these fossils maintained a three-dimensional structure, preserving soft tissue artifacts that glow under UV light—a notable feat for paleontological finds.
Moreover, indications of flexible soft tissue in the hands suggest these creatures could climb effectively, while features in the toe pads imply they spent much of their time on land with limited flight abilities.
Another discovery regarding the palate, or roof of the mouth, confirmed that unlike many birds today, the Archeopteryx skull was not capable of movement in that area. However, there are signs of early evolutionary stages that allow for beak mobility, a trait prevalent in contemporary birds.
The Chicago fossil, encompassing a small vertebral column with two vertebrae at the tail tip, was acquired last year. It had passed through various private collections since its discovery before 1990.
O’Connor expressed excitement about the specimen, stating it stands as the best example of Archeopteryx found to date, providing a wealth of new information.
In 2018, researchers posited that Archeopteryx’s flight differed from that of modern birds, likely characterized by short, rapid bursts. This species had modern-like feathers combined with more archaic features like a long, hard tail and teeth.
Among the twelve Archeopteryx fossils discovered so far, the first was identified in the late 19th century by famous paleontologist Hermann von Meyer, while the latest was uncovered by amateur collectors in 2010, published in 2014, and scientifically detailed in 2018.
