DINOSAUR eggs believed to be 70 MILLION years old have been found in Patagonia, Argentina. In this family fun Jurassic Adventure story for kids, Park Rangers Aaron and LB find a way to escape a giant life. Find great deals on eBay for Dinosaur Egg in Dinosaur Fossils. Shop with confidence. Mothers laid eggs in a raised circular bowl. Opinion Today's Opinion Op-Ed Columnists Editorials Contributing Writers Op-Ed Contributors Opinionator Letters Sunday Review Taking Note Room for Debate Public Editor Video: X-ray equipment, like CAT scans, are used to study the interior of fossil eggs. I used to clean eggs years ago Cathodoluminescence is the most important tool paleontologists have for ball poll whether or not the calcium in fossil eggshell has been altered. There is no evidence of burial in sand or vegetation so they may have relied on the heat of the sun to incubate the nests.