Key leopard population 'crashing', study warns

The leopard population in a region of South Africa once thick with the big cats is crashing, and could be wiped out within a few years, scientists warned on Wednesday.

Allen's Hummingbird boom missed by breeding bird surveys

Allen's Hummingbird has been placed on several conservation watchlists, as breeding bird surveys indicating population declines have spurred concerns that climate change may push it out of Southern California. However, local ...

Demystifying shrinking cities

A new book by geography and planning experts examines several decades worth of data to provide an analysis of the state of shrinking cities across the United States.

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