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I recently learned that waste heat will boil the oceans in about 400 years.

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I often wonder if the collapsing iron core somehow begins producing

anti-matter and that annihilation would be the cause of the rebounding

and the supernova which is a massive energy release.  Where else

could such a quantity of energy come from?  My guess is something

like that might be happening.

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The chances that we are alone in the Universe is

near the vanishing point.

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Aha... Just what I was listening for "abundant oxygen"

as I have learned oxygen isn't abundant in atmosphere's

for long because of its reactive nature, thus, for it to become

"abundant" it has to be constantly generated by some source.

Of course, the most likely source would be life or rather

cyano bacterial or something of similar chemistry.

My guestimate is that it takes from 100million to 800

million years for life to gain a foothold so water needs

to be around for at least that long.  Oxygen isn't all that

necessary for early life to get started only for later more

advanced forms to arise.  So if there was abundant O2

in the atmosphere then there should be life or the evidence

of same awaiting discovery somewhere on Mars. 

Oh and while I'm at it I might suggest that rovers solar

collectors be covered with layers of transparent film which

can then be peeled off once the layer becomes too dirty.

That should give more life time for the machine until some

real cleaning help can arrive in the form of an AI cleaning

unit.

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