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Science

Riceville, Iowa, was the unlikely setting for a controversial classroom exercise created by Jane Elliott. She insists it strengthened their character. Critics say it abused their trust.

Lesson of a Lifetime

Her bold experiment to teach Iowa third graders about racial prejudice divided townspeople and thrust her onto the national stage

Green turtle swimming over coral reefs in Kona

Back from the Brink

Not every endangered species is doomed. Thanks to tough laws, dedicated researchers, and plenty of money and effort, success stories abound

Some mostly solitary species (such as these whitetip reef sharks near Costa Rica) gather to feed or mate.

Shark

Recent attacks on people off the Florida coast are a reminder of the animal’s fierce nature. Yet scientists say the predator is itself in grave danger

A growing number of U.S. firms dismantle used computers and send valuable parts (Circuit Boards #2, New Orleans, 2005) to companies that glean the semiprecious metals.

E-Gad!

Americans discard more than 100 million electronic devices each year. As “e-waste” piles up, so does concern about this growing threat to the environment

After the first atomic bomb explosion (seen here from 10,000 yards away, in a time series from .006 seconds to .081 seconds after detonation), Oppenheimer recalled, "a few people laughed, a few people cried. Most people were silent."

Building the Bomb

A book about atomic scientist J. Robert Oppenheimer charts the debate over deployment of the first A-bomb and the anxiety that suffused its first live test

Dubbed the "human satellite," McCandless (bottom center, with the 1984 Challenger crew, including pilot-photographer Gibson, upper left) now works on space robots.

Footloose

The image of Bruce McCandless’ spacewalk two decades ago still amazes. It was the first untethered walk ever—and was among the last

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Ghost of a Chance

How did the ivory-billed woodpecker, which was feared extinct, hang on all these years?

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Give Weeds a Chance

How a cultivated dislike of gardening can lead to more time on the porch

Footprints and dung are often the only evidence of their route.

Saving Mali’s Migratory Elephants

A new photo library of West Africa’s desert elephants is helping researchers track the dwindling herd and protect their imperiled migration routes.

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Hazy Days In Our Parks

The air in many national wilderness wonderlands is getting worse. As officials debate new rules to curb pollution, scientists find sources are far-flung

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Killers In Paradise

The tropics are home to the world’s most venomous creatures-jellyfish with 4 brains, 24 eyes and stingers that can kill you in a minute flat

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The Year Of Albert Einstein

His discoveries in 1905 would forever change our understanding of the universe. Amid the centennial hoopla, the trick is to separate the man from the math

Biologist Sara Lewis (near Boston) says "they're very single-minded."

Your Branch or Mine?

Fireflies’ come-hither signals are being decoded by penlight-wielding biologists who’ve found treachery, also, in the summer-night flashes

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Seeing a Ghost

A woodpecker feared extinct reappears in Arkansas

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Science Matters

The Institution decides to focus on four basic questions

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Fire in the Hole

Raging in mines from Pennsylvania to China, coal fires threaten towns, poison air and water, and add to global warming

A Martian meteorite fueled speculation and debate in 1996 when scientists reported that it held signs of past life. The search now moves to Mars itself.

Life on Mars?

It’s hard enough to identify fossilized microbes on Earth. How would we ever recognize them on Mars?

Friendly to whites most of his life, Mandan Chief Four Bears (in an 1832 portrait by George Catlin) turned bitter as death approached, blaming them for the disease that would kill him.

Tribal Fever

Twenty-five years ago this month, smallpox was officially eradicated. For the Indians of the high plains, it came a century and a half too late

Outdoor proceedings on July 20, 1925, showing William Jennings Bryan and Clarence Darrow.

Evolution on Trial

Eighty years after a Dayton, Tennessee, jury found John Scopes guilty of teaching evolution, the citizens of “Monkeytown” still say Darwin’s for the birds

Doses of oral polio vaccine are added to sugar cubes for use in a 1967 vaccination campaign

Conquering Polio

Fifty years ago, a scientific panel declared Jonas Salk’s polio vaccine a smashing success. A new book takes readers behind the headlines

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