Sir William

Chosen answer: If my memory serves me correctly from the radio play and the musical (as well as other sources, although I've never read the book), the reason Mars is red is not from the "rust" that we accept now, but from red vegetation. The aliens came and brought this vegetation with them, perhaps to give the earth a more suitable atmosphere (for them).

Gary O'Reilly

Question: I was a little confused. Why did the aliens die? I know it had to do with micro organisms but the answer doesn't come clear to me. Can someone please explain this for me?

Sir William

Chosen answer: It's similar to how the Native Americans were decimated by smallpox and other diseases when America was colonised by Europe - They had never encountered that virus before, so they had no immunity to it whatsoever, and many of them died. The aliens would have no immunity to any diseases, or even a basic hereditary immunity to default earth viri. Basically they all caught some disease or other (maybe even a cold), and died because they had no immunity at all to it.

Gary O'Reilly

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