User:Abyssal/Prehistory of North America/DYK/2
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![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Saniwa_ensidens.jpg/640px-Saniwa_ensidens.jpg)
- ... that a fossil of the extinct monitor lizard Saniwa preserves cartilage, scales, and even a wind pipe?
- ... that Adolf Carl Noé challenged disbelief in the possibility of North American coal balls (example pictured) by presenting a wheelbarrow full of them?
- ... that the extinct stingray Heliobatis (pictured) has been found with up to three stings on its tail?
- ... that Leurospondylus ultimus was so named as it was originally thought to be the last occurrence of a plesiosaur?
- ... that Cliff Palace (pictured) is the largest cliff dwelling at Mesa Verde National Park, a World Heritage Site in Colorado?
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b6/Cottonwood_Limestone%2C_Konza_Trail_Outcrop.jpg/640px-Cottonwood_Limestone%2C_Konza_Trail_Outcrop.jpg)
- ... that Cottonwood Limestone from Kansas was used to build landmarks like the Kansas State Capitol, Great Overland Station, and Bill Snyder Family Football Stadium (pictured)?
- ...that the exposed bedrock of the Duluth Complex was formed from magma emitted when the North American plate began to split apart in the Midcontinent Rift?
- ... that the collection of the Arizona Mining and Mineral Museum includes a specimen of native copper that is 8 ft (2.4 m) long?
- ... that the extinct wasps Dryinus grimaldii and Dryinus rasnitsyni are distinguishable by the modified claws on their front legs?
- ... that the Miocene maple Acer latahense is most similar in appearance to the living Honshū maple?