An introduction, in simple text and illustrations, to farming and the work done on a farm throughout the seasons.

This film follows a group of small farmers with big ideas who fight to start a cooperative to sell their grass-fed beef and are almost undone by a broken food system and their own naiveté. In New York State a farm is lost every 3 days and the Coop’s 2-year struggle affords an intimate perspective on a national problem: is it possible for local food and small farms to compete with an industrialized food system. At stake for many are their farms,...

Rivers are an important clue to the geology of a region and also offer superb possibilities for recreation. Journey to some of America’s national rivers, wild and scenic rivers, water trails, and other river parks, including the Upper Missouri River Breaks, the New River Gorge, and Niagara Falls..

Learn how the pressure flow hypothesis models the movement of sugars through the plant's phloem and xylem, and what plant structures determine whether the organism will grow in height, girth, or both. And while the stem functions to support the plant's branches and leaves, in some plants the stem is also the site of photosynthesis.

The march towards the dominance of GM products in agriculture started 15 years ago but where will it end? Today in Argentina all agriculture is transgenic but after 15 years the weeds have adapted and the Glyphosate no longer works. In response farmers have started using hazardous chemicals in an indiscriminate and unregulated manner. In some areas the rate of serious genetic deformities in children has exploded. We meet the families and doctors convinced...

The grassland ecosystem - steppe, prairie, savanna, and rangeland - is found on every continent except Antarctica. Estimated to cover almost one-third of the land area of the planet, grasses developed unusual adaptations related to the location of their growth tissue and their specific mechanism of photosynthesis. Learn how grasses play a major role in the development of human society.

Unless you live in a completely undeveloped area, chances are your home garden soil is not native. Learn what makes a "great" soil and how to determine your own approximate amounts of clay, silt, and sand; texture; nutrients; pH; and more - before you purchase that "must have" soil addition from the gardening store.

Explore parks where geology supported the settlement of people in North America. Begin at the Mesa Verde cliff dwellings, cleverly engineered to exploit natural shelter and rock seeps. Then survey other cliff dwellings and pueblos in the Southwest..

If you have a garden in the U.S., chances are you're familiar with the damage caused by English ivy, kudzu, purple loosestrife, and/or the tamarisk tree. Each of these hardy plants can quickly create a monoculture, driving out other plant species and limiting the availability of diverse animal habitat. Learn the best science-based mechanisms to control these plants.

Picture being in the Arctic when a polar bear approaches your ship. What kind of camera should you use to capture the moment? What settings should you choose? Here, National Geographic photographer Ralph Lee Hopkins explains how to navigate the unique challenges of polar photography, from dealing with a "white world" to shooting atop a moving platform.