Shortly after Charles Darwin published his The Origin of Species in 1859, T.H. Huxley argued that dinosaurs and birds have a common ancestry. In The Origin of Birds (1916), Gerhard Heilmann commented on the similarities between theropods and birds. By the late 1960s, John Ostrom had identified 22 skeletal features common to both theropods and birds. Then, in 1996, everything changed with the discovery of Sinosauropteryx, a small carnivorous dinosaur. This began the recent scientific acceptance that many dinosaurs had feathers, and that some of these dinosaurs had evolved into modern day birds.
The Oregon Museum of Science and Industry (OMSI) in Portland recently hosted a major display of dinosaurs in which the models move and make sounds. Photos from this special exhibit follow.
Velociraptor:
![photo DSCN1574_zpscd0420c9.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1574_zpscd0420c9.jpg)
![photo DSCN1576_zps4c4cf0b9.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1576_zps4c4cf0b9.jpg)
![photo DSCN1578_zps9c23882d.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1578_zps9c23882d.jpg)
![photo DSCN1582_zps9f5390a7.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1582_zps9f5390a7.jpg)
Velociraptor was a fearsome killer which appears to have been a nocturnal hunter. This animal dates to the Late Cretaceous (75 million years ago). It was warm-blooded and probably had a downy or feathery coat.
Protocerotops:
![photo DSCN1581_zps4454c0cf.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1581_zps4454c0cf.jpg)
![photo DSCN1579_zpse2c9a4c9.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1579_zpse2c9a4c9.jpg)
Found in Mongolia during the Late Cretaceous (75 million years ago), this herd animal had a showy neck frill which may have served for sexual attraction as well as making the animal appear bigger and less vulnerable.
Triceratops:
![photo DSCN1594_zpsabe88c57.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1594_zpsabe88c57.jpg)
![photo DSCN1596_zpsa86187a2.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1596_zpsa86187a2.jpg)
Triceratops is a dinosaur from the Late Cretaceous (65 million years ago). The fossil record indicates that this animal engaged in combat with sexual rivals and predators.
Allosaurus:
![photo DSCN1631_zpsd6a23352.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1631_zpsd6a23352.jpg)
![photo DSCN1640_zps18db6014.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1640_zps18db6014.jpg)
![photo DSCN1646_zpsccd7fba4.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1646_zpsccd7fba4.jpg)
![photo DSCN1647_zpsc90edc6a.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1647_zpsc90edc6a.jpg)
During the Late Jurassic (150 million years ago) this was North America’s largest predator.
Stegorsaurus:
![photo DSCN1659_zpsb7dc2765.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1659_zpsb7dc2765.jpg)
![photo DSCN1661_zps5db72cc5.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1661_zps5db72cc5.jpg)
![photo DSCN1662_zpsd3ba3547.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1662_zpsd3ba3547.jpg)
![photo DSCN1670_zpsd3e8d63b.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1670_zpsd3e8d63b.jpg)
Dating to the Late Jurassic (150 million years ago) this dinosaur stood 4 meters (14 feet) high with a length of 9 meters (30 feet). It has an estimated weight of 7 tonnes (15,000 pounds).
Tyrannosaurus Rex:
![photo DSCN1664_zps6b0f0636.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1664_zps6b0f0636.jpg)
![photo DSCN1665_zpsd868c488.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1665_zpsd868c488.jpg)
![photo DSCN1671_zps0069dfde.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1671_zps0069dfde.jpg)
![photo DSCN1672_zpsa5c5b876.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1672_zpsa5c5b876.jpg)
The young T Rex most likely had a fine, downy covering. This was shed prior to adulthood. Protofeathers are thought to be the precursor of feathers. Theses feathers may have looked like the soft fluffy down of baby chicks.
![photo DSCN1674_zps000edd8c.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1674_zps000edd8c.jpg)
![photo DSCN1690_zps1c03715c.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1690_zps1c03715c.jpg)
Tyrannosaurus Rex was one of the largest land carnivores of the Cretaceous Period.
Dilophosaurus:
![photo DSCN1719_zps9a8b0ad8.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1719_zps9a8b0ad8.jpg)
![photo DSCN1718_zpscbf4353b.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1718_zpscbf4353b.jpg)
![photo DSCN1722_zpsd5736fb1.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1722_zpsd5736fb1.jpg)
![photo DSCN1723_zpsae9dae23.jpg](http://i821.photobucket.com/albums/zz139/Ojibwa/Portland%202014/Dino%20Displays/DSCN1723_zpsae9dae23.jpg)
Dilophosaurus was the largest meat eater of the Early Jurassic (200 to 190 million years ago). With an opposable thumb it was able to grasp prey and hold it tight whiles its power claws could teach meat from both living flesh and dead carcasses. The double crest appears to have been for display purposes as it was not attached to the skull.