Re: Titanium snails

I think the basic stimulus to the evolution of these things was to come
up
with something capable of making holes in titanium-alloy weapons.

on 02.6.28 0:03 AM, Richard Kirke at richardkirke@hotmail.com
scribbleth:
>
> For a really hard coating you want calcite grown on a polymer
framework as
> in the nautilus (sp) which has to be cut with a diamond saw, which
makes it
> pretty damn hard!
> 
> Calcite is Calcium carbonate (aka chalk), which is pretty easy to get
hold
> of in an ecosystem, but when grown on the (organic) polymer framework
it is
> extraordinarily hard.

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