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Rulers of the Jurassic Seas

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

By Ryosuke Motani

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

Captured in Amber

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

By David A. Grimaldi

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

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