A meteorite that originated from Mars and was named Tissint, was found to contain large diversity of chemical fossils. Some of the fossils are shown in [link to www.flickr.com (secure)] These organic molecules could not have been formed without past life.

Added on Feb.17, 2023: The impossibility of abiogenesis is detailed in [link to creation.com (secure)]
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[link to www.cs.unc.edu (secure)]
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[link to christiananswers.net (secure)]