Tickets to "@Large: Ai Weiwei on Alcatraz" will go on sale June 27. The show, which will feature seven site-specific installations by the Chinese conceptual artist and political activist Ai Weiwei, opens Sept. 27.

In this installment of BioBlitz 2014 video coverage, we highlight the taxonomists whose job it is to find and identify species, and to organize the wide variety of life on earth.

BioBlitz 2014: volunteers have 24 hours, from noon Friday through noon Saturday, to inventory living things - plants, animals, insects, fungi, even bacteria - in the vast Golden Gate National Recreation Area. The goal is to add to the park's official species list and to stress the importance of protecting biodiversity.

A new consortium, dubbed the 'Tamalpais Lands Collaborative" or TLC, will see the National Park Service, California State Parks, the Marin Municipal Water District and Marin County join forces to nurture and help restore Mount Tamalpais in the coming years.

Four government agencies and a nonprofit support group--the National Park Service, California State Parks, the Marin Municipal Water District and the county of Marin--have bonded together in an unusual agreement to help preserve and protect Mount Tamalpais, Marin County's signature mountain.