A black and white dragonfly resting on a blade of grass.

Tracking Mercury With Dragonflies

Caitlin Dempsey

Research on mercury levels in dragonfly larvae from 73 U.S. national parks reveals insights into mercury deposition patterns.

A photo of an ashen area with steam coming out of a geyser.

Hydrothermal Explosions

Caitlin Dempsey

Hydrothermal explosions are dramatic, natural events that occur when superheated water and steam are suddenly released from beneath the Earth's surface.

Tourists with cameras photography a grizzly bear crossing the road.

The Recreational Value of Nature and Wildlife

Mark Altaweel

Measuring the economic benefits of wildlife and outdoor areas supports conservation with tools like the NPS Visitor Spending Effects.

Gravity wave clouds over a forest on a bright sunny day.

How Undular Bores Show Up in the Clouds

Caitlin Dempsey

Undular bores create distinctive wave-like cloud patterns, such as morning glory clouds, by pushing warm air upward.

A lizard clinging upright on a steep rock with dried grass behind it.

Urbanization is Shortening the Legs of Western Fence Lizards

Caitlin Dempsey

Western fence lizards have adapted to manmade surfaces in urban areas by developing shorter limbs and toes.

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