@sarahdoingthing what prompted this?
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@thesublemon too much nature documentaries - 2 more replies
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@sarahdoingthing “interfertility is not a transitive relation” http://en.wikipedia.org/wiki/Ring_species … -
@sarahdoingthing Ontologists still use species as the canonical example of natural kinds http://en.wikipedia.org/wiki/Natural_kind … > - 2 more replies
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@sarahdoingthing on the other hand "what can mate with what" lets you picture pluto slamming into venusThanks. Twitter will use this to make your timeline better. UndoUndo
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