Commentaries

The Zoo Challenge.  An editorial on the case of Marius the giraffe at the Copenhagen Zoo.

When Extinction is a VirtueA commentary on the ethics of species de-extinction. An alternate and longer version will appear in my forthcoming volume (co-edited with Steve Pyne), After Preservation: Saving American Nature in the Age of Humans, to be published by the University of Chicago Press in early 2015.