70 million years ago
Mean atmospheric O2
150% of modern level
Mean atmospheric CO2
6x pre-industrial level
4°C above modern level
Geologic Time Scale
A two ton, 15-foot-long ceratopsid dinosaur of the genus Nedoceratops wanders a Cretaceous forest 70
million years ago in what is today Wyoming. Nedoceratops had two prominent
horns above its eyes and a single bump above its nose.
Like the better known Triceratops, Nedoceratops was a Ceratopsid, a family of large
four-legged plant-eating dinosaurs characterized by beaks, rows of shearing
teeth in the back of the jaw, and elaborate horns and frills. While they
resemble defensive shields, the frills are in fact relatively fragile,
suggesting that they may have served a purpose other than protecting against
a brute force attack. One possibility is that the frills were employed as
visual displays in order to intimidate rivals and attract the opposite sex.
© Walter B. Myers. All rights reserved.
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