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Re: Dietary factors & giant land mammals

On Tue, 8 May 2001, Ken Kinman wrote:

>     Grasses in particular aren't terribly nutritious or easy to digest.  And 
> even large mammoths quickly evolved dwarf forms in environments where food 
> became relatively scarce and/or less nutritious.

Ironic, then, that the largest extant birds live in, and depend upon,