This spring, as we celebrate the fiftieth anniversary of Earth Day, many social historians are asking questions about the legacy and efficacy of what was initially known as the “environmental teach-ins.”

Red-billed oxpeckers that feed on rhinos’ ticks alert them to approaching humans, likely helping the poor-sighted animals survive.

The Cultural Walk reminds us that we are newcomers, just the latest arrivals in a long line of people who have found refuge and made a home in the Sonoran Desert. The informational plaques explain that the Hohokam arrived in the 1100s. Yet even they were far from the first to make this valley their home. People have been residing here for almost 4,000 years.

How evidence of the presence of the fishing cat in mangroves of the Godavari delta is fuelling conservation efforts.

Shoppers need to wash their reusable bags more often, even in better times.

What does a Central Valley almond farmer have in common with a San Diego homeowner? The answer is simple: Water. More specifically, the amount of water they need to sustain their respective lifestyles — which is a lot.

Researchers at the University of Arizona Water and Energy Sustainable Technology Center are testing wastewater across the country to trace coronavirus prevalence in communities and help public health officials better prepare for the future.

Research led by the University of Arizona Laboratory of Tree-Ring Research has anchored a long sequence of tree rings, providing context for the civilizations that existed throughout the Bronze and Iron Ages.

It’s pretty, sports feathery leaves resembling a carrot plant and bright yellow globes. It has an aroma that has been described as pungent, medicinal or astringent, and not even goats will consume it. It grows like a weed and, left unchecked, it could destroy much of the desert landscape it blankets.