Clarion Island, part of the Revillagigedo Archipelago, lies 430 miles west of the Mexico mainland’s Pacific Coast.  In the 1970s, the Mexican military brought a variety of non-native animals to the remote island, disrupting the native ecology.  In recent years, the Mexican government has sought to reverse that damage by removing destructive invasive species, including sheep, rabbits, pigs and iguana lizards.  “Hold the phone,” says Daniel Mulcahy, an organismal biologist and Head of Tissue and DNA Collections at the Museum für Naturkunde in Berlin, Germany.  Mulcahy headed up a study that demonstrates that those supposedly-invasive iguanas actually arrived on Clarion Island some 425,000 years ago.  Daniel Mulcahy joined the Monday Buzz on November 17, 2025.

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