Tetraceratops insignis ("four-horned face emblem") is an extinct synapsid from the Early Permian that was formerly considered the earliest known representative of Therapsida, a group that includes mammals and their close extinct relatives.[1][2][3] It is known from a single 90-millimetre-long (3.5 in) skull, discovered in Texas in 1908. According to a 2020 study, it should be classified as a primitive non-therapsid sphenacodont rather than a genuine basal therapsid.[4]
Walking with Evolution is a documentary show about the ancient past about first sea life, the beginning of the reptiles, the great dying, rise and fall of the dinosaurs, and then rise and region of the mammals.
