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How dinosaurs hopped across an ocean

Ancient land bridges may explain how animals navigated breakup of continents

10:48am, July 22, 2016
dinosaur illustration

BRIDGE THE GAP  Land crossings may have allowed dinosaurs (such as Supersaurus, shown in this artist’s illustration), lizards and early mammals to migrate across the Atlantic Ocean around 150 million years ago, one researcher proposes.

Two land bridges may have allowed dinosaurs to saunter between Europe and North America around 150 million years ago.

The bridges would explain how dinosaurs, mammals and other animals were able to hop from one continent to the other after the Atlantic Ocean formed during the breakup of the Pangaea supercontinent. Some species of Stegosaurus, for instance, appear in the fossil record on both sides of the Atlantic.

Leonidas Brikiatis, an independent biogeographer in Palaio Faliro, Greece, proposes that two strips of land bridged North America and Europe during the late Jurassic and early Cretaceous periods. One bridge spanned from eastern Canada to the Iberian Peninsula, where Spain is today, and lasted from around 154 million to 151 million years ago. The other linked North America and Scandinavia from around 131 million to 129 million years ago, Brikiatis reports in the August

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