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The new "Extreme Mammals" exhibit opens at the Denver Museum of Nature & Science on Sept. 23.
The new “Extreme Mammals” exhibit opens at the Denver Museum of Nature & Science on Sept. 23.
John Wenzel, The Denver Post arts and entertainment reporter,  in Denver on Wednesday, Oct. 1, 2025. (Photo by Hyoung Chang/The Denver Post)
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Calling anything “extreme” has become a marketing cliché these days, but a new exhibit at the Denver Museum of Nature & Science backs it up with some of nature’s oddest creations.

“Extreme Mammals,” which opens Sept. 23, corrals everything from a 15-foot-tall, 20-ton extinct vegetarian to the tiny, 50 million-year-old, 1-inch Batodonoides (both mammals!) in its pursuit of evolutionary exceptionalism. Fossils and lifelike models join multimedia displays and hands-on activities to trace the ancestry of our animal forbearers.

The best part? Itap all included with general admission. 9 a.m.-5 p.m. daily at 2001 Colorado Blvd. Tickets are $10-$15 and available by calling 303-370-6000 or visiting

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