Hypselosaurus eggs

Extremely well-preserved dinosaur eggs

Eggs close up
Eggs on display

All dinosaurs laid eggs, just like their closest relatives - birds. Some dinosaurs built nests on the ground, while others are believed to have buried them like certain reptiles do today.

Here you will find an extremely well-preserved and extensive collection of fossilized eggs from a Hypselosaurus - a long-necked dinosaur (sauropod) that lived during the late Cretaceous period, approximately 70 million years ago. In the gallery you’ll find pictures that show how the Hypselosaurus is believed to have looked like.

When Hypselosaurus hatched from its egg, it was no bigger than a rabbit. In just 10-15 years, the Hypselosaurus reached its full size. At that point, it was up to 12 metres long, 4.5 metres tall and weighed around 10.000 kilos.

Eggs from a Hypselosaurus were the first dinosaur eggs to be discovered back in 1846. For many years, however, they were believed to be eggs from large birds. Hypselosaurus was one of the last sauropods in Europe. It fed on plants and ws widely distributed in the area that now comprises northern Spain and France. This collection of Hypselousaurs eggs was found in present day Provence, France, in 2023.

A spectacular detail is that these eggs are believed to have been laid by the mother as she was slowly moving forward and not laid in a nest. The eggs were found and have been preserved in the exact same position as they were left 70 million years ago.

The eggs are 100% intact. In the future, we will have the eggs scanned to see if there are fossilized unborn offspring in some of the eggs.