To: John W
Are asteroids humanity's 'greatest challenge'?
I'd say crazy human political ideologies are humanity's greatest challenge. But asteroids have been the cause of several mass extinctions in the Earth's history and they are certainly a far more serious danger than global warming.
To: AnotherUnixGeek
Are asteroids humanity's 'greatest challenge'?No no no...
...Carbon dioxide is...
26 posted on
06/28/2017 8:19:38 AM PDT by
Does so
(PARIS is like OPEC, except We're Winning!)
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