Re: Question, what do things do when they freeze?


"Timberwoof" <timberwoof.spam@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:timberwoof.spam-FBA926.00380427042007@xxxxxxxxxxxxxxxxxxxxxxxxxxx
In article <HfeYh.524$C35.386@xxxxxxxxxxxxxxxxxxxxxx>,
"George" <george@xxxxxxxxxxxxxxx> wrote:

Every year nearly 40,000 tons of microscopic particles from asteroid
collisions or passing comets rain down on the Earth. Much of this
extraterrestrial debris is vaporized or melted in the atmosphere. Only
a
tiny amount of dust - mainly particles no bigger than the width of a
human
hair-- survives entry, much of it settling to the bottom of oceans and
lakes or is trapped in ice. If there were significant amounts
contributing
to the huge volume of the earth, we'd see substantially larger amounts
of
it in the Antarctic ice cores than we actually find.

Where does the vaporised dust go?

Well, some I would think gets incorporated into the atmosphere, some rains
down to the planet, but since the particles get vaporized at such high
altitudes I would think that a lot of it escapes back into space.

George


.

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