A new study published in PLOS has shed light on the evolution of flexible joints, a characteristic that is unique to humans and some other animals. Researchers found that this trait was inherited from the earliest jawed fish, which lived around 450-500 million years ago during the Silurian period. These ancient fish were among the first vertebrates to evolve jaws, and their skeletons showed evidence of flexible joints that allowed for greater mobility.
The study's findings suggest that the common ancestor of all jawed vertebrates, including humans, possessed flexible joints as a key feature of its anatomy. Over time, this trait was retained and modified in different species as they evolved from these ancient fish. The researchers used computational methods to analyze the structure and flexibility of joints in various animal groups, including humans, and compared them to those found in fossil records of early jawed fish.
The discovery has implications for our understanding of the evolution of human anatomy and the development of flexible joints in other animals. It also highlights the importance of studying the evolution of complex traits like joint mobility, which are essential for movement and flexibility in many species.
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