The sail-backed predator Dimetrodon is one of the most iconic animals of the early Permian—long before dinosaurs dominated Earth. Most known species of this early relative of mammals reached large body sizes, sometimes up to 3 meters (10 feet) in length and 250 kilograms (550 pounds). Yet some ...
Source: [Phys.org](https://phys.org/news/2026-06-famous-predator-shrank-ways-fossils.html)