Feature

Toothless whales, such as blue whales, use keratin plates called baleen to filter their food from the ocean. Baleen reveals a surprising amount of information about a whale’s physiology. Photo by Doc White / NPL

How Whales Found Peace in War

A forgotten museum collection reveals how a pause in industrial whaling during World War II changed whales at the molecular level.

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Surf smelt are an integral source of sustenance for many coastal species, including humans.
Listening to the Smelt

By monitoring the embryos of a little-studied forage fish, scientists hope to track and minimize the damaging effects of pollution in important coastal habitats.

By the early 1970s, DDT and other organochlorine pesticides had decimated peregrine falcons across much of their native range. Photo by Knud Falk
The Fleet-Winged Ghosts of Greenland

A mysterious population of peregrine falcons in the Far North has inspired environmental action and scientific research around the world.

Specks of sand cling to a Kemp’s ridley sea turtle hatchling as it makes its way to the ocean.
The Riddle of the Ridley

After years of steady gains, a decades-long conservation program for the world’s most endangered turtle hits rough seas.

A group of longnose suckers at a spawning ground in British Columbia, Canada. Photograph by Michel Roggo / NPL
The Rough Fish Revolution

Fisheries scientists are only now coming to understand the important roles native “rough fish” play in freshwater ecosystems across North America—even as these long-maligned species are increasingly at risk.

More than two dozen dead tegu lizards in various stages of decomposition at a study site in Knoxville, Tenn. Photograph by Stephen Ornes
Life Among the Dead

Decomposing animals host diverse ecosystems that reveal the inner workings of microbial life.

Windows into the Earth

The freshwater springs of the American Southwest are among the most endangered ecosystems on Earth. Fortunately, they're also among the most resilient.

An image of a heath hare
Splitting Hares

In Sweden, researchers working to save a rare variety of mountain hare think conservation should focus on genes, not just species.

The Pinyon Paradox

Steering pinyon jays from decline requires better knowing and tending one of the American West’s most unappreciated woodlands.

A herd of elk faces off against a wire fence, a common sight in the Colorado mountains and throughout the American West. Photograph by John Boland / Shutterstock
Entangled

Laid end to end, the world’s fences would reach the sun. What are they doing to wildlife?