Do you know how archaeologists can find dinosaur skeletons millions of years after their death? Yes, thanks to ice. This is the case for most of the creatures discovered in the last century, deep within the permafrost.
Let’s take this nodosaurus as an example. Dated to around 110 million years ago, it lived during the Cretaceous period. The spikes you see on its back are a defense mechanism that they were able to develop through evolution.
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