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Dinosaurs had teen pregnancies too

Dinosaurs had teen pregnancies too
Jennifer Viegas, Discovery News

Most dinosaurs were parents before they reached adulthood, according to recently announced research.

The find puts dinosaurs on the list of animals that had teenage pregnancies that includes crocodiles, lizards and humans.

...The discovery, announced in Austin at the US Society of Vertebrate Paleontology's annual meeting, also suggests why evolution favours early births in these groups...

...Lee and colleague Sarah Werning extracted bone tissue from three types of dinosaurs: Tyrannosaurus rex, Allosaurus and Tenontosaurus...

...Three of the examined dinosaurs had a special type of bone tissue called medullary tissue that was used as temporary calcium storage before eggshells were made...

...Based on the growth stages of the dinosaurs, the scientists determined that T. rex was laying eggs by the age of 18, Allosaurus by age 10 and Tenontosaurus by the very young age of 8...

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Dann Pigdon
GIS / Archaeologist              geo cities.com/dannsdinosaurs
Melbourne, Australia             heretichides.soffiles.com