Re: Need scientific backup for comet impact story I'm writing.

Hi everyone. I'm writing a story about a comet hitting the Earth.
What I need to happen is a comet will hit the Earth and cause some
serious localized damage but not end the world as we know it. What I
need to know is:

Is this even scientifically possible? I ask because from what I've
already read some say that even a very small object could end all life
on Earth.

What size would this comet have to be to hit the Earth and not kill
everyone? The size of a car? A house? An office building?

Are there any circumstances that would make survival more likely? For
example, if the comet hit the North Pole or somewhere with very deep
snow? Would this make any difference at all in the outcome? Would
deep snow or ice dampen the amount of debris flung up into the
atmosphere? What if it hit an inland lake or a swamp?

This is going to be a work of fiction but I'd like to make it as close
to real as possible. I'm one of those nitpicky people who likes
details like that. If anyone has any input on this I'd love to hear
it! Thanks!

-Charles

2 scenarios: It hits ocean, and giant waves destroy all coasts.
Such happened with a giant meteor breaking and plumetting
into Jupiter. They found huge and rapid waves moving on Jupiter
afterwards, suggesting that Jupiter has 10 times more water
than previously thought. The other phenomena is the Moon's
craters, Earth is heavier than the Moon, so the craters would
be smaller.

I don't believe a meteorite wiped out dinosaurs. I think that
gravity was different in the past, lighter and dinos grew, but
when the heavy gravity returned in the dark matter fields
that vary and cause this, dinos became inable to cope with
the heavy gravity with their weak bones and died out.

Actually the effect of dark matter may be experienced
as a lighter place where the Sun speeds up. It makes
sense that a heading is altered by gravitational changes.
It is how dark matter relating to spiral galaxies only can
be explained.

A crater must be destroyed. Earth elected as president.


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