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Re: Titanosaur eggs
On Sat, 21 Nov 1998, William Monteleone wrote:
> It looks like ontogeny sets the stage for the look of the neonate.
> They grow oversized eyes and heads because that's the way the tissues
> develop best in preparation for life.
Yes. And this is true more for the skull, eyes, and brain than
other body parts such as limbs. A good hypothesis for why this is true is
because there is a limitation in the amount of gross structural changes
and development in an up-and-running brain, i.e., the brain must be in a
more finished state at birth. Incidentally, an interesting fact which may
bear on this is that the bigger a species' brain is the more white matter
vs grey matter it has. In other words, the proportion of the brain
devoted to connections is bigger than actual sensory, associative, or
> Then in animals where parental
> involvement evolves, the parent's learn, or evolve appropriate
> behaviours and responses to this look. But that's secondary.
And in some species that look is so desirable they may also breed _other_
species to fulfill this desire, eg., humans and lapdogs.