Educators

Plant Morphology

Online Resource

Plant Morphology

From leaf margin and arrangement to the parts of a flower and a corn seedling, take an illustrated look at plant morphology with this collection of guides.

Who Are the Plants?

Article

Who Are the Plants?

There are 10 divisions in the plant kingdom. The largest order, flowering plants, has 235,000 species. The smallest, gingkoes, has a single species. Learn more about the orders in the kingdom Plantae.

Global Grocery

Global Grocery

Have you ever wondered what gives chocolate its flavor? Or where olive oil comes from? You might be surprised to learn just how far some of the items in your shopping bag have traveled.

Welcome to the Dzanga-Sangha

Welcome to the Dzanga-Sangha

Travel to the lush Dzanga-Sangha rainforest with BaAka. This excellent tour guide will show you the sights—and help you find the clues needed to play Connect the Dots.

Life in the City

Life in the City

Even the busiest of cities are buzzing with biodiversity. Take a virtual stroll through a city park for a close-up look at some of the inhabitants you otherwise might not notice.

Web of Life

Web of Life

In this group game, discover how all the players in an ecosystem depend on each other to survive. As you play, you'll come up with the connections between different species and their environments.

Seasonal Cycle

Interactive

Seasonal Cycle

If the Earth turns all the way around every 24 hours, then why are some days longer than others? And why do we have winter and summer? See the answers for yourself—in a matter of seconds.

Dispatch from the Deep: Home Again

Article

Dispatch from the Deep: Home Again

From Pennsylvania to the Pacific Ocean and back again. Experience the final day of an expedition to study deep sea vents with this eyewitness account, and learn what came of the research.

Cindy Lee Van Dover

Article

Cindy Lee Van Dover

For oceanographers, the work they do at sea is just the beginning. Learn more about the discoveries made by one scientist who completed more than 100 dives to the sea floor.

Case Study: John Michell And Black Holes

Online Resource, Article

Case Study: John Michell And Black Holes

Imagine gravity so strong that even light is contained by its force. When a country parson first described black holes in 1783, the concept was so ahead of its time that it was mostly ignored.

Case Study: Fossil Microbes on Mars?

Online Resource, Article

Case Study: Fossil Microbes on Mars?

A meteorite that escaped from Mars 16 million years ago was found recently in Antarctica. Does it, or doesn't it, hold evidence that proves the existence of life on the red planet?

Case Study: Neutrino Observatories

Online Resource, Article

Case Study: Neutrino Observatories

Update your image of astronomers. Today they spend most of their time peering into computer screens rather than through the eyepiece of a telescope. Learn what this new vantage point has gained them.

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