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Mystery Bumps

Scientists knew that alligators’ jaws are covered in bumps but it took biologist Daphne Soares to figure out why

Having stopped a mother bear with a tranquilizer dart shot from the helicopter, Derocher (with Andersen, left, and Instanes, on Spitsbergen Island) tethers the cubs and takes tissue samples to gauge the mother's exposure to industrial chemicals like PCBs.

Bear Trouble

Only hundreds of miles from the North Pole, industrial chemicals threaten the Arctic’s greatest predator

Bringing Up Baby

Scientists zero in on the caring and cunning ways of a seldom-seen waterbird

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The Stuff of Genes

Fifty years after the discovery of DNA’s structure, the payoff hasn’t matched the hype. But really, we’ve only just begun

MODIS image of the Arctic

Exotic Climes

Going the extra mile for bears and bats

A 6-year-old girl played with the radioactive material, coating her hands with the cesium dust while eating.

The Hunt for Hot Stuff

In the former Soviet Union, “rad rangers” are racing to find lost radiation devices before terrorists can turn them into “dirty bombs”

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Ice Capades

Alaska’s husband-and-wife team of avalanche experts work to save lives all winter, then take to their kayaks in summer

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To the Rescue

Las Vegas showman Jonathan Kraft went from riches to rags to turn a patch of Arizona desert into a refuge for abused and abandoned exotic animals

9-planet solar system

Caution, Planets Ahead

The world’s largest (maybe) 9-planet solar system model goes up along Route 1 in northern Maine

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Just Looking: Sweet Sorrow

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Testimony from the Iceman

The 5,000-plus-year-old Neolithic man discovered a decade ago is telling scientists how he lived and died

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Mission Impossible?

An international campaign to rid the world of polio has made dazzling progress. But some experts question whether the scourge can ever be eradicated

Over the past 20 years, a significant decline in the smallmouth bass population of a much cleaner Lake Ontario has coincided with an explosion in cormorant numbers.

Shoot-out at Little Galloo

Angry fishermen accuse the cormorant of ruining their livelihood and have taken the law into their own hands. But is the cormorant to blame?

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Iceberg Wrangler

When a million-ton iceberg threatens your $5 billion oil platform, who you gonna call? Jerome Baker

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Sea Searchers

Scientists launch a $1 billion effort to track marine life worldwide

Grace Levy, 95, of Lunenburg, quit school at 13 to clean houses: "My Dad said you've gotta work."

Puzzle of the Century

Is it the fresh air, the seafood, or genes? Why do so many hardy 100-year-olds live in yes, Nova Scotia?

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No Place Like Home

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Sherlock of Spuds

In a case that could reveal the villain behind the Irish Potato Famine, the gumshoe is a plant scientist

They pop their heads out of the water to keep track of family members.

Otterly Fascinating

Inquisitive, formidable and endangered, giant otters are luring tourists by the thousands to Brazil’s unspoiled, biodiverse waterscape

Calhoun tends some 450 apple varieties, more than four times the number commercially cultivated in this country.

Apples of Your Eye

Fruit sleuths and nursery owners are fighting to save our nation’s apple heritage…before it’s too late

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