Science Ecology

Follow along with this class as they explore a creek near their school in Pennsylvania! They want to learn about the water and its ecosystem, so they perform a survey to determine its quality and biota. What do you think they will find?

The Last Great Mountain tells the story of the first ascent of Kangchenjunga the third highest but reputedly the hardest mountain in the world. It was an astonishing achievement for a British team led by Everest veteran Charles Evans. Drawing on interviews, diaries and unpublished accounts, Mick Conefrey begins his story in 1905 with the disastrous first attempt on the mountain by a team led by Aleister Crowley, explores the three dramatic German expeditions of the the late 1920s and brings it all to a climax 50 years later with the first ascent by Joe Brown and George Band.

Water scarcity is on everyone's mind. Long taken for granted, water availability has entered the realm of economics, politics, and people's food and lifestyle choices. But as anxiety mounts - even as a swath of California farmland has been left fallow and extremist groups worldwide exploit the desperation of people losing livelihoods to desertification - many are finding new routes to water security with key implications for food access, economic resilience, and climate change.

The shift from the Paleolithic to Neolithic periods represents a watershed moment in human history. While many may consider the humans of both stone ages to be unintelligent barbarians, this brief history proves that the humans of yesteryear were just as smart as we are today. Between 10,000 BC and 2,000 BC, they instituted revolutionary changes in human life. All over the globe, formerly nomadic people began settling into villages, farming, and creating high-tech stone inventions.

Spend a day and night in the forest! Learn about this wooded habitat through the fascinating animals that call it home. Leap from tree to tree with a squirrel searching for breakfast. Pounce with a fox on the forest floor. Soar with a red-tailed hawk as the sun sets.

In the mid-1930s, North America's Great Plains faced one of the worst man-made environmental disasters in world history. Donald Worster's classic chronicle of the devastating years between 1929 and 1939 tells the story of the Dust Bowl in ecological as well as human terms. Twenty-five years after his book helped to define the new field of environmental history, Worster shares his more recent thoughts on the subject of the land and how humans interact with it.

Over the course of his career, Hal Borland wrote eight nature books and hundreds of "outdoor editorials" for the Sunday New York Times, extolling the virtues of the countryside. From his home on one hundred acres in rural Connecticut, Borland wrote of the natural wonders, both big and small, that surrounded him every day. Beyond Your Doorstep is his guide to venturing into the outdoors around your home, wherever it is, and discovering the countryside within reach.

The monumental statues of Easter Island, both so magisterial and so forlorn, gazing out in their imposing rows over the island’s barren landscape, have been the source of great mystery ever since the island was first discovered by Europeans on Easter Sunday 1722. How could the ancient people who inhabited this tiny speck of land, the most remote in the vast expanse of the Pacific islands, have built such monumental works?

A seed falls from a plant. A mouse eats the seed. An owl eats the mouse. Each animal gets energy from its food. How does energy flow from one living thing to another? Let’s investigate food chains and food webs!

Bottled & Sold shows how water went from being a free natural resource to one of the most successful commercial products of the last 100 years - and why we are poorer for it. It's a big story and water is big business. Every second of every day in the United States, a thousand people buy a plastic bottle of water, and every second of every day a thousand more throw one of those bottles away. That adds up to more than 30 billion bottles a year and tens of billions of dollars of sales. Are there legitimate reasons to buy all those bottles?

A natural history of the wilderness in our homes, from the microbes in our showers to the crickets in our basements Even when the floors are sparkling clean and the house seems silent, our domestic domain is wild beyond imagination. In Never Home Alone, biologist Rob Dunn introduces us to the nearly 200,000 species living with us in our own homes, from the Egyptian meal moths in our cupboards and camel crickets in our basements to the lactobacillus lounging on our kitchen counters. You are not alone.

The climate in a region affects all aspects of life. This book looks at polar climates. It explores the characteristics of the land and weather in regions with polar climates, and how plants, animals, and people have adapted to life in polar regions. The effects of climate change and other developments are also covered.

The climate in a region affects all aspects of life. This book looks at tropical climates. It explores the characteristics of the land and weather in regions with tropical climates, and how plants, animals, and people have adapted to life in tropical regions. The effects of climate change and other developments are also covered.

The climate in a region affects all aspects of life. This book looks at desert climates. It explores the characteristics of the land and weather in regions with desert climates, and how plants, animals, and people have adapted to life in deserts. The effects of climate change and other developments are also covered.

A small reptile scurries across a rock under the hot sun. It's a lizard! Learn more about these desert animals.

What plants and animals grow strong surrounded by water? Find out what lives in wetland habitats.

What plants and animals can survive with very little water? Find out what lives in desert habitats.

Next to a continent or in the middle of the ocean, all islands are surrounded by water. These landforms can be rock, sand, or even coral. Listen to Islands to learn about life on these isolated places.

Who's that digging in the desert sand? It's an armadillo! Listen to find out why armadillos dig.

Rushing rivers meet the sea, dropping dirt, soil, and clay. Deltas form, in all shapes and sizes. Listen to Deltas to learn about these flat, fertile landforms.