Questions for Some Arctic dinos lived in herds
![](https://www.snexplores.org/wp-content/uploads/2019/11/hadrosaur-footprints-865x579.jpg)
A hadrosaur footprint made roughly 70 million years ago.
COURTESY OF PEROT MUSEUM OF NATURE AND SCIENCE
A hadrosaur footprint made roughly 70 million years ago.
COURTESY OF PEROT MUSEUM OF NATURE AND SCIENCE
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