Re: [DIYbio] Your opinion on reviving extinct species

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Technically it's the opposite; the *ratio* of body mass to surface
area tends to decrease as an animal grows larger, so it's easier to
stay warm in cold climates if you are bigger, provided you can find
enough food to pay for the larger size.

That's why Siberian tigers are the largest Tiger species, and probably
why Polar Bears are so Fing large, too. It's an interesting tidbit
when you consider Elephants, whose bodies are perfectly shaped for
retaining heat due to an accident of evolution, but who live in very
hot climates; they use their ears to dump heat, so if you cut off
their ears they'll die (and you'll go to hell).

However, the energy cost for just being a gigantic T-Rex is still
going to be pretty large, so you'll have to feed it plenty of wasteful
meat feedstock just to have an amusing feathered giant in your
Jurassic Park. Meanwhile all the important keystone species that
aren't as "awesome" are going extinct and nobody'll pay to revive them
because Michael Crichton never wrote a book about it.

On 04/02/2013 02:12 PM, Mega wrote:
> I heard the same with temperature. there are thise beautiful flying
> insects who were up to more than a meter in length. and also trex
> was used to 42°C.
>
> Bigger bodies means big surface, which in turn means more energy
> for heating required if atmospheric temperatures are low....
>

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