Mark Kelly

Scott Kelly/NASA via AP

It turns that out that spending a year in space can shrink your heart. A new study published this week examines the effects of weightlessness on the human cardiovascular system. KNAU’s Ryan Heinsius reports.


A bipartisan bill under consideration in the U.S. Senate would invest billions of dollars in updating the nation’s water infrastructure. Among its many provisions, the package would direct funds to Southwestern tribes. KNAU’s Ryan Heinsius reports.

AP, file

Supplies of COVID-19 vaccines are expected to increase nationwide in the coming weeks following the U.S. Food and Drug Administration’s approval of a third treatment. It’s welcome news for health officials in Arizona who’ve expanded immunizations. But because of limited supplies, less than 10% of the state’s population has been fully vaccinated. KNAU’s Ryan Heinsius spoke with Arizona Democratic Sen. Mark Kelly about efforts to increase shipments and how to make vaccine distribution fair across all communities in the state.

Ryan Heinsius / KNAU

Arizona’s U.S. Senators have introduced a bill that would ban all new uranium mining near Grand Canyon National Park. KNAU’s Ryan Heinsius reports, it’s the latest of several attempts to protect the area’s water and environment.

Three congressional Democrats from Arizona are calling on federal officials to fully fund a major water system for the White Mountain Apache Tribe. The long-delayed project has kept many residents without safe and reliable drinking water. KNAU’s Ryan Heinsius reports.