The suggestion of beryllium was somewhat tongue-in-cheek ie not to be
taken seriously, I did mention there would be a few problems, death
being somewhat a terminal one.
I agree with Bruce that specific heat*density is what is really
required (I'd forgotten how light beryllium is. I don't seem to have
much laying around to be familiar with it)
As an aside, cuts from copper swarf can take a long time to heal.
Sorry if I've lowered the tone of a good list.
Phil
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