Glaciers and permafrost can preserve an entire organism. Only very young - Pleistocene - fossils are preserved this way. 7. Recrystallization: The original skeletal material has grown into new ...

Commonly, fossil shells made of aragonite will recrystallize into a more stable form of the same compound called calcite. Recrystallization preserves the shape of the original fossil, though sometimes ...

Each year, the Smithsonian Institution—the world’s largest museum, education and research complex—grows in its holdings, one fascinating object after another. The highest-profile additions to the ...

Focus: investigating the timing of biomineral switches in Late Cretaceous bryozoans and their relationship to changing seawater chemistry Museum scientists are investigating the timing of a switch ...