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originally posted by: Bluntone22
a reply to: intrptr
High Temps and co2 helped plants thrive setting a chain reaction for everything to grow larger.
Life did not start "all at once." Predator and prey evolved together and in the case of sauropods, over hundreds of millions of years.
If life started all at once I'd imagine it took awhile for the predator prey relationship to take hold sparking changes in the animals evolution?
For example, there were no grasses in the Mesozoic, which are a major food source for herbivores, McNab said.
"How is it that dinosaurs got larger than mammals if the resources were either equal to or poorer than today? My argument is, it's because they took most of the energy they consumed and put it into growth rather than into maintenance of a high body temperature," he said.