Scientists from the Smithsonian Center for Tropical Research document the astounding abundance of diversity in tropical rainforests to discover why so many species coexist that are competing for the same resources. In North America, the Yellowstone Wolf Reintroduction project explores why removing just one species dramatically changed the distribution of plants and animals up and down the food web.

Get more energy by being more energetic. In this practical guide, leading physiotherapist Anna-Louise Bouvier reveals the ideal walking workout to rebuild muscles. This simple workout divides your everyday walk into three sections, targeting shoulders and arms, then buttocks and legs, and finally heart and lungs. Build and maintain your strength and confidence without having to rearrange your life.

Turn your walk into a workout and maximize fat burning with this cutting-edge guide. Leading physiotherapist Anna-Louise Bouvier gets the latest advice from exercise scientist Lisa Champion. With just a few critical adjustments to your everyday walk, you can build your bottom, your bones, and your entire body. Tone your thighs, flatten your stomach, and create shapely arms with this breakthrough guide. Make every step count.

If you spend lots of time traveling for work, this is a must-see. Hotel rooms can be luxurious, but they can also play havoc with your work and sleep routine. Learn how to set up your room to be ergonomic and comfortable by creating different zones for work and sleep. Discover the surefire strategies to prevent tossing and turning all night. In this fun and engaging program, leading physiotherapist Anna-Louise Bouvier shows you how to make your hotel...

Focusing on endangered species, Part Five in the Saving My Tomorrow series highlights stories about animals in danger of becoming extinct, alongside scenes with kids who are working to protect the natural world around them – from the planting of oysters and banding birds to recycling. Also featured are readings and performances by Laura Dern, Stephin Merritt and They Might Be Giants, along with a behind-the-scenes look at the American Museum of...

In this episode, Last Human Standing explores the origins of "us" - where modern humans and our capacities for art, invention, and survival came from, and what happened when we encountered the mysterious Neanderthals. Crucial new evidence comes from the recent decoding of the Neanderthal genome. Did modern humans interbreed with Neanderthals? Exterminate them? Becoming Human examines why "we" survived while our other ancestral cousins - including...

Earth, water, wind, and fire according to tradition, these four pieces make up the complex puzzle of our world. In the spirit of that tradition, is there a fifth component, one so close and disturbingly powerful that we choose to overlook it? This program reverses the concept that nature shapes human destiny and instead focuses on the impact our species has had, and will continue to have, on the Earth's geological cycles. Perhaps surprisingly, the...

Ever heard the phrase you are what you eat? Well, if you're one of the world's committed carnivores, it could be said that your eating habits are a significant contributor to the pressing problem of global warming. The impact of raising animals for meat includes deforestation and greenhouse gas emissions. This video explores food alternatives aimed at reducing meat consumption, including cultured meat and pea protein burgers.