More than 100 million years of evolution’: How snakes evolved and lost their legs

New scientific evidence is shedding light on the evolutionary trajectory of snakes and the biological processes that led to the loss of their limbs. According to reporting from Live Science on May 10, 2026, the evolution of these reptiles spans more than 100 million years.

Researchers are utilizing a combination of newly discovered fossils and modern technology to trace the origins of serpents. This analytical approach allows scientists to reconstruct how ancestral species transitioned into the diverse forms seen in modern populations.

The scope of this evolutionary research covers a vast array of species, including constrictor snakes and poisonous snakes. The findings examine animals of varying scales, from huge snakes to tiny snakes, to understand the common ancestral traits that define the group.

the research explores the diverse ecological niches occupied by early snakes. This includes the study of species that developed different methods of movement and survival, such as those that slither, burrow, or swim.

By combining fossil records with current technological tools, scientists are working to determine the specific timeline and environmental pressures that influenced the loss of legs and the development of the streamlined body plans characteristic of snakes.