Well for that meteorite in peru, its prettty easy to find out if it was the cause for the sickness.. just check for the cause in the victims, and then check the meteorite for signs of the cause as well. If the cause of the desease cannot be found on the meteorite, the meteorite is clearly not the cause.

By the way, did you know there is a theory that life might have originated in space and been brought to earth by asteroids? Its called panspermia.

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