Analyzing the fat of killer whales reveals what they eat

Scientists are studying the diets of the ocean's top predators as they change in response to their environments. This is because how much and what they eat can affect how ecosystems function.

Can hybrid reefs defend the coasts?

The U.S. military has an idea to save its seaside bases from some of their most relentless foes: flooding, erosion and storm surge.

How bringing back lost species revives ecosystems

Scientists often study the grim impacts of losing wildlife to hunting, habitat destruction and climate change. But what happens when endangered animals are brought back from the brink?

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