Joey Burns, singer of Calexico, performs with the rest of band at the Rialto Theater as part of a benefit show for Gabby Giffords. Saturday September 20, 2008 Β Tucson, Arizona photo by: Mamta Popat/Arizona Daily StarΒ 

The University of Arizona will celebrate Earth Day and the 10th anniversary of UA research at Biosphere 2 on Saturday with a day of activities that include hermit crab releases every half hour at the Biosphere ocean, and a sunset concert by Calexico.

Biosphere 2, 32540 S. Biosphere Road in Oracle, about 30 minutes outside Tucson, is adding to its regular tour events special lectures and panel discussions on the future of the Earth, energy, water and food; beach and rainforest tours; and groundbreaking for a vertical farm complex.

The research center also will include a focus on Tucson as the first UNESCO City of Gastronomy. Tucson-based chefs, growers, producers, distillers, ranchers, innovators and advocates will be set up in the main tent on the Biosphere 2 lawn.

VIP tickets for the all-day special event and the Calexico concert at sunset are $32 each and include a Biosphere 2 annual pass.

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