Articles by Helen Fields

As the Planet Warms, What Happens to the Reindeer?

Ecologists are racing across the ice to find out how climate change will affect the Arctic natives

After ruling out diet, scientists discover the secret behind blue feathers lies inside how the feathers are made.

Why Are Some Feathers Blue?

New research into a long-puzzling feature of avian life shows there's more to color than meets the eye

A tiny blob of stretchy brown matter, soft tissue from inside the leg bone, suggests the specimen had not completely decomposed.

Dinosaur Shocker

Probing a 68-million-year-old T. rex, Mary Schweitzer stumbled upon astonishing signs of life that may radically change our view of the ancient beasts

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Invasion of the Snakeheads

The voracious "Frankenfish" has turned up in the Potomac River, Lake Michigan and a California lake, sparking fears of an ecological Armageddon

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