Bear Down 100 - Dendrochronology

WHEN TREES WRITE HISTORY, WE READ THE RINGS

HOW TREES BECAME TIME MACHINES

Founded in 1937 by Andrew Ellicott Douglass, the University of Arizona’s Laboratory of Tree-Ring Research formalized the new field of dendrochronology, the scientific study of tree rings. From its Tucson base, LTRR researchers have unlocked Earth’s environmental history, reconstructed past climates, and informed fields from ecology to archaeology. Along the way, Wildcats built one of the world’s most extensive tree-ring collections, transforming wood into a precise record of time and our planet.

Discover Dendrochronology

A Century of Bear
Down Moments

From groundbreaking discoveries and research to unforgettable victories, Wildcats carry the Bear Down legacy across campus and the world every day. In celebration of 100 years of “Bear Down,” we’re highlighting 100 stories that embody what it means to Bear Down today and into the future.

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A Stage Built on Loyalty and Legacy

Dedicated on Feb. 29, 2024, the Craig T. Nelson Stage at the Marroney Theatre honors one of Arizona's most beloved alumni. Years of philanthropic commitment transformed the space and launched a lasting legacy through scholarships and alumni generosity.

Alumni Achievement

From Campus to The Cosmos

Honored in 2026 as the Big 12 Faculty Member of the Year, Regents Professor Marcia Rieke has shaped our understanding of the universe through decades of pioneering space science. As principal investigator of the James Webb Space Telescope's Near Infrared

Research

From Tucson to the Top of the Game

A University of Arizona standout, Rob Gronkowski rose from Wildcat student-athlete to Super Bowl champion. His career reflects the determination, discipline, and larger-than-life spirit that carried him from campus to the national spotlight.

Alumni Achievement

Honoring Women Who Shaped the World

Dedicated on Sept. 30, 2005, the Women's Plaza of Honor celebrates women's achievements through art, landscape, and story. Built through a decade of community collaboration, it reflects a lasting commitment to inclusion, recognition, and cultural impact.

Community Impact

Indigenous Resilience Through Partnership

Founded in 2014, the Agnese Nelms Haury Program advances tribal resilience, sovereignty, and ways of knowing through research and outreach. Funded by philanthropy and housed within the Arizona Institute for Resilience, it reflects the university's land-gr

Community Impact

The Godfather of Desert Discovery

Dr. Homer L. Shantz, botanist and president of the University of Arizona from 1928 to 1936, advanced arid lands research in the Southwest and helped secure land in 1933 for Saguaro National Monument, which became Saguaro National Park in 1994.

Community Impact

Climate Science with Global Consequence

In 2007, University of Arizona researchers contributed to the Nobel Peace Prize-winning IPCC Fourth Assessment Report. Their interdisciplinary leadership strengthened the university's global reputation in climate research and scientific collaboration.

Research

Feeding a City's Global Identity

On Dec. 15, 2015, Tucson became the nation's first UNESCO City of Gastronomy, supported by University of Arizona scholars. The Center for Regional Food Studies advances food justice, cultural heritage, and community pride across the region.

Community Impact

Create Your Own Bear
Down Moment

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