Contrary to conventional wisdom holding that early galaxies were composed of mostly hydrogen and helium, new observations suggest that galaxies were seeding the cosmos with heavy elements just 500 million years after the Big Bang.

Four decades of satellite records reveal that roughly 80% of global drylands are experiencing extreme swings in interannual productivity, and current models are missing it.

Congratulations to our faculty and staff members being recognized at this year's University Service Awards. We are grateful for your dedication and many years of service to the University of Arizona and the Wyant College of Optical Sciences.

Four decades after Tucson stopped serving contaminated water on its south side, one in three residents who drank it are still reporting symptoms of post-traumatic stress, a new U of A study has found.

During the NASA Inspiration Tour at the U of A, students shared the space missions and technologies they are building and engaged directly with NASA leaders about the opportunities ahead.

From industry internships and national laboratories to research experiences and professional development programs, Optical Sciences students spent the summer developing technical skills, building professional networks, and exploring career opportunities across the optics and photonics community.

These experiences provide valuable hands-on training while helping students prepare for future careers in industry, academia, and research.

New research has found that Y chromosome loss occurs in healthy-seeming tissue before tumors begin to form, making the loss of a hormone an early indicator of cancer danger.

Scientists were stunned when they discovered a fossilized tooth from a capybara that lived in the Atacama Desert in northern Chile almost 9 million years ago.

Passionate about pushing the boundaries of optical sensing, photonics, and precision measurement? Excited to lead a brilliant team of scientists and engineers while still contributing hands-on to groundbreaking R&D? Join us in advancing technologies that impact industries worldwide, while building your leadership and expanding your technical skills.