Complex sentence: The Center for PostNatural History is a storefront museum in Pittsburgh's Garfield neighborhood that, in contrast to typical natural history museums, it is focused on the collection and exposition of organisms that have been intentionally altered by humans by means including selective breeding or genetic engineering.
Split into simpler sentences: The Center for PostNatural History is a storefront museum in Pittsburgh's Garfield neighborhood. In contrast to typical natural history museums, it is focused on the collection and exposition of organisms that have been intentionally altered by humans by means including selective breeding or genetic engineering.