Cockroaches have existed for over 400 million years. The earliest known cockroach fossil is Rhyniognatha hirsti found in Rhynie Chert in Aberdeenshire, Scotland dating back around 410 million years. More information about cockroaches, entomology, paleontology and future Nature Live events can be found on the provided websites.

1. Cockroaches: From the beginning
With Ed Baker and David Nicholson,
Entomology and Paleontology Departments
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10. Rhyniognatha hirsti
Rhynie Chert, Aberdeenshire
Scotland
~410Ma

12. United States Department of Adamantios, wikipedia
Agriculture