Changes to size, teeth and ears in various rodents in Chicago found to be part of their adaptation to human development.

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Chicago rodents have evolved with city life. Museum skulls reveal how urbanization is quietly reshaping wildlife.

This summer in Chicago, the Field Museum is turning up the heat – and the chills – with its new exhibit, featuring a rare specimen not seen anywhere else in U.S. The “Reptiles Alive ...

Urban wildlife is evolving right under our noses — and scientists have the skulls to prove it. By examining over a century’s worth of chipmunk and vole specimens from Chicago, researchers discovered ...

This summer in Chicago, the Field Museum is turning up the heat - and the chills - with its new exhibit, featuring a rare specimen not seen anywhere else in U.S. The "Reptiles Alive" exhibit opens ...

Chipmunks are members of the same family as squirrels. The small rodents spend most of their time aboveground, eating seeds, ...

Chipmunk specimens in the Field Museum's collections. Credit: (c) Field Museum "Over the last century, chipmunks in Chicago have been getting bigger, but their teeth are getting smaller," says Feijó.

In all, the Field Museum's collection of amphibians and reptiles is one of the six largest herpetological collections in the U.S., with over 300,000 specimens. More from CBS News ...

Fossil nerds and speculators help make the Field Museum's Mazon Creek collection world-famous Illinois’ commercial fossil trade is alive and well thanks to collectors who are motivated by money ...