Re: Expanding Earth and Shrinking Animals
Those are ALL good reasons but let's break it down to a more fundamental level.
I really must admit that I haven't looked too deeply into the expanding Earth scenarios but at first rub, this strikes me.
Unless the growth is from the direct accumulation of mass in the form of Iron, the density of the Earth would decrease while the radius increases. Newton's Law
would then suppose that the force of gravity would decrease over time.
Think about it, how could Mars, with 1/10th the mass of Earth have 1/3rd the force of gravity on the surface.