Topic: Triassic fossil discovery

A fossil from the late Triassic period has upended one of paleontology's long-standing assumptions. Scientists have found the first evidence that a cynodont, part of the group of mammal-like reptiles that gave rise to all modern mammals, gave birth to live young rather than laying eggs. The discovery pushes the timeline of live birth back by up to 95 million years, according to researchers behind a study published today in Frontiers in Mammal Science.