J.Stephen McDaniel S.S.C.Gimp POWER wrote:
> i was watching the Discovery channel an Astronomer said that 100,000
> tons of dust falls on earth every year that much mass over the 150.0000
> years could increase gravity. maybe that helped kill off the dinosaurs.
> just wondering anyone wanted to discuss my ideas?????
>
100,000 tons sounds like a lot, but the current mass of the
earth is about 1.36 X 10^20 tons. (That is, 136 followed by
18 zeroes.) How long would it take for 100,000 tons per
year of dust to increase the earths's mass by one-millionth?
About 1.36 million years! The dinosaurs weren't bothered
by cosmic dust, any more than we are. A moderately large
piece of rock from space hitting the erath, would throw up
much more dust in an instant, and that is a (controversial)
theory of what killed the dinosaurs.
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