User:Abyssal/Prehistory of North America/DYK/52
Appearance
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Ginkgo_adiantoides_-_G._cranii.jpg/100px-Ginkgo_adiantoides_-_G._cranii.jpg)
- ... that the Paleocene Ginkgo cranei is the first fossil Ginkgo to be described from Tertiary "seeds"?
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Kinneyia_Grimsby_Silurian_Niagara_Gorge.jpg/100px-Kinneyia_Grimsby_Silurian_Niagara_Gorge.jpg)
- ... that microbial mats increase our understanding of evolution by helping to preserve soft-bodied organisms and soft parts of hard-shelled animals?