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To use the biogenic image detector, load two similar file from your desktop, and hit 'Is it Alive?'. Current file size limits are set at 1000 kilobytes per session. Although biological stromatolites and non-biological stromatolite-look-alike structures appear similar to the human eye, the biological origin of stromatolites makes them more ordered, more highly patterned. And it is this patterning that, while hard for the human eye to discern, is readily detected by the compression algorithm. Non-biological stromatolite-like structures are more random, less patterned and therefore less compressible.

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