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Re: mammal mystery
bruce thompson wrote:
> There may have been less cover than there is now. Didn't grasses
> only make an appearance very late in the dinos' reign?
fern and briar and brush and shrubs and gorse and other plant-like nouns
that sound short make a far-denser ground cover than mere grass can. So
the ground-level cover was pretty impressive stuff throughout most of
the age of dinosaurs. Grass is a sucessful competitor to this other
stuff by over-spreading it's shallow root system to get all the
nutrients in an area and starve all the other plants, so you are only
used to the way groundcovers compete now. Back then it was every weed
for itself. And no, grass came AFTER dinosaurs were extinct.