DNA in Ice

Ice and permafrost are the best media to preserve DNA. Prehistoric animals like the, , and microbes have been perfectly  in ice sheets. In most cases DNA could be extracted from these mummies.

Although the Mesozoic Era was the longest period of warmth during the last 500 million years, it was repeatedly affected by short cold interludes lasting about one million years. During these ice ages glaciers formed, which could have contained aquatic reptiles and parasites.

However, when thw ice ages ended all those ice sheets were lost to the oceans. The oldest known ice sheet is located in the  and is only 8 million years old. Therefore, it is very unlikely that any Mesozoic glacier still exists today. Until a Mesozoic glacier is found, it is impossible to recover Mesozoic DNA from ice.

Jurassic Park media
In Jurassic Park: Builder the DNA of prehistoric sea creatures, like Elasmosaurus or Tylosaurus, can be found in leechlike parasites that are frozen in ice.