Play the video above to see these stories on AZ Illustrated Nature for Wednesday, April 17:

BIOSPHERE 2, the University of Arizona's unique research facility, is preparing exhibits and events to mark Earth Day. Tony Paniagua reports on the activities and, in a second story, interviews Matthew J. Adamson, Bisophere 2's associated director of K-12 education.

GROW DOWN at the Tucson Botanical Gardens called on local landscape professionals to create unique spaces. We look at the third and fourth entries in two more installments of this AZ Illustrated Nature mini-series.