Dinosaurs » Dinosaur - History Of Eggs
|Dinosaur - History Of Eggs|
Dinosaurs are extinct
(apart from their descendants the birds) and their eggs
are represented today as fossils, in particular trace fossils.
Trace fossils of dinosaurs are marks or indicators preserved
in the rocks left by the particular vertebrate at a particular
time. Other trace
fossils include. They represent that
product of egg laying activity and can offer clues to how
The inside is not preserved during fossilization
(apart from some rare dinosaur babies). However, there
are some clues to what the inside of the eggs
looked like. By looking at the nearest living
relatives of dinosaurs today, such as the birds
and crocodiles, we can estimate to what the inside
of dinosaur eggs looked like. Housed inside the
egg is a thick or viscous liquid which bathes
the embryo and keeps it moist, preventing it from
drying out. This allows the egg to be laid on
land and is a feature of animals called amniotes
- all reptiles, birds and mammals.
Dinosaur eggs have been known for thousands of years, although at first they were not recognized as 'dinosaur eggs' and were used for jewellery and shaping ornaments. Many eggshells were found in late Palaeolithic or early Neolithic sites in Mongolia.The first real discovery of dinosaur eggshell was in 1859 from southern France, by Jean Jacques Pouech. The French eggs were thought to belong to giant birds at first, because of their large size. More complete eggs were found in 1869 by Matheron. He thought these eggs belonged to a giant crocodile. In 1877 Paul Gervais (1816-79) published the first detailed study of the eggs, and suggested that they could belong to a dinosaur. They are now known to have been laid by the sauropod dinosaur Hypselosaurus.In 1923 the Central Asiatic Expeditions of the American Museum of Natural History made significant new discoveries in the Gobi Desert, Mongolia. Roy Chapman Andrews found the first recognized dinosaur nests. The eggs were thought at that time to belong to Protoceratops but are now known to belong to Oviraptor.