Scientists have found a novel way to trace the path of mercury in the environment — through dragonflies.

For the first time in the United States, biologists have used a flu vaccine designed specially to protect the endangered California condor.

Hundreds of species of succulent plants are native to the American Southwest. Succulents are any plant with fleshy tissue that’s adapted to store water to use during droughts. All cactus species are succulents, but not all succulents are cacti.

Renewable energy eases the world’s reliance on fossil fuels and cuts CO2 emissions. But the benefits of these advances also come with costs.

Bumble bees are fuzzy, efficient and colorful pollinators. Arizona's mountains are home to a dozen species of bumble bees, out of nearly 50 native to North America and 250 worldwide.

The Hubbell-Joe Navajo rug was woven out of hand-spun wool by the Joe Family in the 1930s. It was displayed at their Winslow trading outpost to attract tourists during the Depression. At 21 by 33 feet, it was the world’s largest Navajo rug.

Each spring and fall, migrating birds take on journeys that put Olympic athletes in the shade. For example, a Western Tanager weighing-in at around an ounce may fly from Western Canada to Central America.

At the Crane Petroglyph Heritage Site in the Verde Valley, visitors can reach through time for a glimpse of life in this place almost a thousand years ago.

Visitors awed by the size and beauty of the Grand Canyon often comment on how beautiful its night skies are, too. Many visitors get their first-ever sight of the Milky Way there – and night sky programs are the most popular run by the National Park Service, with attendance around five times higher than for geology presentations.

The bright face of the Red-faced Warbler can glow like a gem against its contrasting black crown and pale gray breast. Both males and females share this color pattern, though the females are slightly duller.