Dinosaur Embryo Study Breaks New Ground

Newly studied embryos of a long-necked, plant-eating dinosaur are the earliest known for any terrestrial vertebrate, or backboned animal, researchers say. The scientists claim the discovery yields new clues to how primitive dinosaurs evolved into the largest animals ever to walk on Earth.
It also provides a rare glimpse into the life of the Massospondylus, an early dinosaur that grew to five metres (more than five yards) and was fairly common in South Africa, they said.

The 190 million year-old embryos are from the beginning of the Jurassic Period, the middle of an epoch known as the age of dinosaurs.

World Science Daily