How does interplanetario rock exchange happens?

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I have read that Mars & Earth exchange rocks and that is how martian rocks happen to have been found on Antartica. But how does this happen? What kind of impact has to happen so we find rocks in another planet with millions of km of space inbetween?

In: Earth Science

2 Answers

Anonymous 0 Comments

An asteroid smashes into Mars, fragments of the planet reach escape velocity and orbit around the sun for millions of years and eventually land on Earth.

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