Grades 9-12

Article: Yellowstone National Park is a Volcano

Article

Article: Yellowstone National Park is a Volcano

More than three million visitors step onto this charged volcanic landscape every year. Yet the geologists that monitor it are unconcerned about a large, imminent eruption. Find out why.

Article: Signs of Restlessness

Article

Article: Signs of Restlessness

The magma chamber responsible for Yellowstone's volcanic activity is buried 8km beneath the surface. Find out how researchers monitor its geologic moves.

Article: Zircons Recast Earth's Earliest Era

Article

Article: Zircons Recast Earth's Earliest Era

Rocks older than 4 billion years are not available to study, making the first 500 million years of Earth's history particularly mysterious. But cutting-edge techniques are now allowing geologists to study survivors of Earth's early era.

Article

Diabetes in a Dish: Using Stem Cells to Study Disease

While technological advances are making it easier for the 21 million diabetics in the United States to manage healthy lives, diabetes is still a disease that requires vigilance. See how scientists are using stem cells to find a cure.

The Enigma of High Energy Cosmic Rays

Article

The Enigma of High Energy Cosmic Rays

In 1912, Viktor Hess took to the sky in a hot-air balloon and discovered a radioactive energy now called “cosmic rays.” Travel to Argentina to see how scientists now hope to discover at long last where the highest-energy cosmic rays are coming from.

Essay: Stars in Exquisite Accuracy

Essay

Essay: Stars in Exquisite Accuracy

There’s only one star that astronomers have a firm grasp on: the Sun. Fundamental facts about other stars remain elusive. Find out how a powerful interferometer atop Mount Wilson in Southern California hopes to change that.

Species and Sprawl: Humans

Article

Species and Sprawl: Humans

Sprawl is affecting Homo sapiens as it does many other species: it alters our habitat, hampers our mobility, and diminishes odds for survival.

Species and Sprawl: Wood Turtles

Article

Species and Sprawl: Wood Turtles

See how scientists are using radio telemetry to gain a clearer picture of how much and what kind of space wood turtles need to survive.

Species and Sprawl: Yellow Starthistle

Article

Species and Sprawl: Yellow Starthistle

Seeds can't move by themselves, so they rely on moving things to give them a lift. Discover how cars are taking homespun seed dispersal mechanisms to a new level.

Species and Sprawl: Mountain Lions

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Species and Sprawl: Mountain Lions

What's the animal-friendly antidote to California's urbanization? Some believe the solution is to make the corridors between disparate patches of wild lands truly useable by many different species.

Science Stays Alert, Part I: Birds Under Scrutiny

Article

Science Stays Alert, Part I: Birds Under Scrutiny

In a handful of cases, humans have contracted H5N1 from birds and then passed the virus to other humans. Even so, doctors and scientists are taking great pains to prepare for the possibility of such a pandemic.

Elephants Return to the Forest

Article

Elephants Return to the Forest

Unlike most zoo-raised or domestic species, Asian elephants have never been selectively bred, so they remain genetically wild. See how this helps with forest reintroduction efforts. 

Article: The Wild Horse, Yesterday and Today

Article

Article: The Wild Horse, Yesterday and Today

Modern horses are part of the family Equidae. The fossil history of Equidae is well documented, but new evidence about its evolutionary history — and new interpretations of it — continue to accumulate. 

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