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History of the Decorative Egg  •  Decorative Egg Museum  •  Wild Bird Egg Museum  •  Dinosaur Egg
Hypselosaurus Dinosaur Egg Fossil
Hypselosaurus Dinosaur Egg Fossil

Prehistoric Dinosaur Egg Museum

The Milwaukee Public Museum provided certification that Dovetail Gallery's dinosaur egg is the only prehistoric egg on display in Wisconsin. The 70 million year old Hypselosaurus egg, along with two CT scans, is a remarkable piece of history.

  How the Hypselosaurus Dinosaur may have looked

The Hypselosaurus Priscus (high-ridge lizard) lived in the late Cretaceous era about 70 million years ago. These members of the titanosaurid dinosaur family evolved from Alaska and Russia and spread to Europe. Hypselosaurus was a medium-sized cousin of the brontosaurus with peg-shaped teeth that were too weak for chewing. Hypselosaurus grew to about 40 feet in length and weighed about ten tons.

The eggs of this dinosaur are special in two ways: they were the first dinosaur eggs ever found and they are the largest dinosaur eggs known to date. The volume of the eggs is about half a gallon, and they are twice the size of ostrich eggs. They have been measured at around 1-foot (0.30 m) in length. The Hypselosaurus egg at the Dovetail Gallery was found near the Aude River in the Pyrenees Mountains of France. According to a visiting palentologist, only 1/10th of 1 % of dinosaur eggs have remains inside.

Once owned by Steven Spielberg, director of Jurassic Park, this Hypselosaurus egg has been authenticated as real and rare, complete with an MRI scan revealing the embryo of this docile 40-foot dinosaur. The egg still has a Hypselosaurus baby inside, but it will never hatch because it's been fossilized. Seventy million years ago a landslide or flood probably buried the nest and egg. Water, rock and dirt turned to sediment, which kept the egg safe. Later, the sediment turned to stone, water invaded it, and eventually it eroded and revealed dinosaur nesting sites.


The egg was purchased from Steven Spielberg in 1993 by the late Steve Nicolet of Milwaukee. Nicolet, a business acquaintance of Spielberg, was known for creating outrageous candies in conjunction with Hollywood blockbusters. For the movie Jurassic Park, Nicolet created giant speckled jaw breakers with butterscotch centers that looked amazingly like the dinosaur eggs in the film.

After Nicolet's death, the egg artist Kathy Mand Beck was presented with an opportunity to acquire this authenticated dinosaur egg and its MRI scan and has brought this rare treasure to her Dovetail Egg Art Museum and Gallery to share with dinosaur buffs, egg art aficionados and the just plain curious. The dinosaur egg has been on permanent display for the public to see.

Egg Art is the oldest medium within the broad spectrum of the decorative arts, dating back to 722 BC when a Chinese chieftain gave painted eggs as edible gifts during a spring festival. The egg's miraculous role in issuing forth new life puts the egg at the center of early mythology in virtually every culture. In the 13th century painted eggs with intricate designs contained religious meanings. Throughout history, the egg has been one of the most pervasive mediums for creative expression.

In 2015, the Dinosaur Egg will have a new home at Grumpy's Ice Cream (7849 Hwy 42) in Egg Habor. More information about the move will be posted as it is made available.

Learm more about the dinosaur egg in the recent video: Uniquely Wisconsin: Jurassic Egg.