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<blockquote data-quote="Derren" data-source="post: 6115192" data-attributes="member: 2518">To use the dolphin example, we would have a much easier time to understand dolphins than any lifeform from mars and that even when we could observe them in person instead of talking over radio.And no, we could not be sure if we would get along with them when we are not in conflict over resources.The least, but not the only one. Gravity? Radiation?Besides as I understood it you were saying that earth plants might grow in a mars greenhouse. What if mars has a lot more radiation than earth? I don't think our plants would do well in that case.So even if we manage to replicate the environment of mars, have seeds transferred which also manage to &quot;digest&quot; the minerals found on earth and build up a storage of martian food, there is still the question of the why? There wouldn't really be an advantage economically to exchange people (who would be confined for the rest of their lives (and the likelihood is great that it will be short) to a greenhouse except for satisfy some peoples curiosity and to acquire some sample for a weapon program (not that a few corpses would allow you to create bioweapons but you could test chemicals).To use my previous example, billions of years ago the eagle and seaweed had a common ancestor. Mars and earth plants would not. So unless you can combine an eagle with seaweed or subscribe to a &quot;earth was seeded from space and mars, too&quot; theory you don't even need to think about combining alien with terrestrial plants.What scientific knowledge is expanded by building a greenhouse?</blockquote>

[QUOTE="Derren, post: 6115192, member: 2518"] To use the dolphin example, we would have a much easier time to understand dolphins than any lifeform from mars and that even when we could observe them in person instead of talking over radio. And no, we could not be sure if we would get along with them when we are not in conflict over resources. The least, but not the only one. Gravity? Radiation? Besides as I understood it you were saying that earth plants might grow in a mars greenhouse. What if mars has a lot more radiation than earth? I don't think our plants would do well in that case. So even if we manage to replicate the environment of mars, have seeds transferred which also manage to "digest" the minerals found on earth and build up a storage of martian food, there is still the question of the why? There wouldn't really be an advantage economically to exchange people (who would be confined for the rest of their lives (and the likelihood is great that it will be short) to a greenhouse except for satisfy some peoples curiosity and to acquire some sample for a weapon program (not that a few corpses would allow you to create bioweapons but you could test chemicals). To use my previous example, billions of years ago the eagle and seaweed had a common ancestor. Mars and earth plants would not. So unless you can combine an eagle with seaweed or subscribe to a "earth was seeded from space and mars, too" theory you don't even need to think about combining alien with terrestrial plants. What scientific knowledge is expanded by building a greenhouse? [/QUOTE]

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