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Re: Mystery of Mass Extinctions Is No Longer Murky
Erik Boehm writes:
Speaking in terms of diversity, are we not in a mass extinction event now - human caused?
If we want to rank ourselves amongst mass extinction causes, then we'll
really have to lift our game. Extinction events caused by direct or indirect
human activity are nothing compared to those in the geologic past. The
Permian/Triassic extinctions in particular really raised the bar.
GIS / Archaeologist http://geo_cities.com/dannsdinosaurs
Melbourne, Australia http://heretichides.soffiles.com