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The Terror Birds of South America

These huge, swift creatures were the dominant carnivores of the continent for millions of years, until competitors drove them into extinction

By Larry G. Marshall

The Evolution of Life on Earth

The history of life is not necessarily progressive; it is certainly not predictable. The earth's creatures have evolved through a series of contingent and fortuitous events

By Stephen Jay Gould

Rulers of the Jurassic Seas

Fish-shaped reptiles called ichthyosaurs reigned over the oceans for as longas dinosaurs roamed the land, but only recently have paleontologistsdiscovered why these creatures were so successful

By Ryosuke Motani

Madagascar's Mesozoic Secrets

The world's fourth-largest island divulges fossils that could revolutionize scientific views on the origins of dinosaurs and mammals

By Andr R. Wyss and John J. Flynn

Fossils of the Flaming Cliffs

Mongolia's Gobi Desert contains one of the richest assemblages of dinosaur remains ever found. Paleontologists are uncovering much of the region's history

By James Clark, Malcolm C. McKenna, Mark Norell and Michael J. Novacek

Dinosaurs of the Antarctic

Their excellent night vision and apparent warm blood raise a question: Could they have survived icehouse conditions at the end of the Cretaceous period?

By Patricia Vickers-Rich and Thomas Hewitt Rich

Captured in Amber

The exquisitely preserved tissues of insects in amber reveal unique secrets of evolution

By David A. Grimaldi

Breathing Life into Tyrannosaurus Rex

By analyzing previously overlooked fossils and by taking a second look at some old finds, paleontologists are providing the first glimpses of the actual behavior of the tyrannosaurs

By Gregory M. Erickson

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