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Newspaper
Aiken Standard
Location
Aiken, South Carolina, United States of America
Date
Aug 01, 2014
Page
7
A Washington study maps theropod dinosaurs downsizing into early birds. Researchers analyzed 120 species and 1,500 skeletal features to build a detailed theropod family tree, noting a 50 million year trend of shrinking bodies and evolving toward robins and hummingbirds.
A Lee study chronicles theropod evolution showing large dinosaurs shrinking, becoming more feathery and birdlike. Theropods reduced body size four times faster than other dinosaurs, while some lineages like Tyrannosaurus rex remained distant cousins to birds. The earliest theropods weighed about 600 pounds 220 to 230 million years ago and shrank toward about 360 pounds around 200 million years ago.
New York researchers have developed see through mice for study of anatomy. The specimens are not alive and are euthanized before skin removal. Organs become transparent while bones stay opaque, creating gelatinous blocks held by connective tissue.
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