Grades 9-12

Mangrove Threats and Solutions

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Mangrove Threats and Solutions

Straddling land and sea and teeming with life, mangrove forests are key to healthy coastal ecosystems. They're also among the most threatened habitats in the world. Learn more.

Article: When Is "Wild" Actually "Feral"?

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Article: When Is "Wild" Actually "Feral"?

The takhi is the only true wild horse left in the world. The so-called "wild" horses that abound in Australia and North America are actually feral. Find out what it means when a domestic animal becomes feral. 

Article: GRACE Watches Earth's Water

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Article: GRACE Watches Earth's Water

Earth's water is in constant motion. It cycles through the planet's atmosphere, surface, and depths. This water cycle is fundamental to Earth’s climate — and is being dramatically affected by global warming.

Article: Zircons Recast Earth's Earliest Era

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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.

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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.

Species and Sprawl: Humans

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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

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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

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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.

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