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Martian
Meteorites
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We have discovered pieces
of other planets laying around on Earth!
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A large impact on any planet,
moon, asteroid, sends parts flying
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Can land anywhere on the
Earth
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Allen Hills ice field in
Antarctica easiest place to find
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Conveyor belt effect of ice
sheet dumps meteorites in a pile at one end
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Chemical composition determines
where meteorite from
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MARTIAN METEORITES MAY SHOW
FOSSILIZED MICROBES
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small tubes
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problems: other ways to chemically
assemble evidence
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tubes much smaller than similar
shaped organisms on Earth
Meteorite
ALH 84001
Meteorite
ALH 84001 x 100,000
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