If something destroys mankind in that 200k years it's mankind itself.


I thought the same myself.
Take a read at this...
This also
These aren’t the articles that suggest 200,000 years until oceans start to evaporate, however, they are found on the same site.

It takes about billion years from sun to "cook" earth which happens much before it engulfs inner solar system.

Most studies suggest that it will only take a few million years after a certain point for the Earth to die.
Some of my more reliable astronomy books suggest that they may be as small as 10Km in diameter... Other, also reliable sources on the internet suggest
some are ~the size of Earth...
Anyway, take a look at these ones...
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[edit on 25-12-2004 by ChrisRT]