Fossilised adult dinosaurs, eggs and embryos were discovered in the Golden Gate Highlands National Park.

The fossils are all of the Massospondylus species, which is a relative of the large, long-necked sauropods. Tiny footprints made by baby dinosaurs were also found at the site.

Researchers say that at least ten different nests have been found at different depths in the area. The evidence suggests that the creatures returned repeatedly to the same nesting site and also gathered in groups to lay their eggs.

The fossils show that the baby dinosaurs stayed at the nest until they had at least doubled in size, according to the report in Proceedings of the National Academy of Sciences.