(July 9, 2013 at 5:31 pm)Rhythm Wrote: Where once we imagined a desolate earth that grass crept across, we now see a densely vegetated earth with some grasses who were busy doing (apparently nothing) until 55ish mya being overtaken by said grass in the face of competition. Grazing mammalians are much better represented from the time period thence and hence in any case (relative to whats been pointed at for grazing dinos). Don't you think?
If you are trying to make the case that grass were not abundant before 50 million years ago because grass grazing animals was not abundant, I think you have to make allowance for abundance of quadrupad ceretopsian dinosaurs who were probably at least partial grass grazers, but who were not recognized as such because no one thought there were grass for them to graze on.
