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Re: sauropods: homotherm,heterotherm or gigantotherm?

If the connection holds, the argument would probably go like this:

1. Large animals have to use food with a small nourishing value
2. Thus they need proportionally more food than small animals
3. Thus they need to be actively feeding over a large amount of
  time per day
4. Thus they have to have high endurance
5. Thus they have to be endothermic.

The argument is much simpler: if they are big, they need high endurance _just to carry their weight_ on land.