Join Jeff Corwin on Wildlife Nation as he races to save threatened gopher tortoises in central Florida. A new real estate development threatens their habitat, prompting Jeff and a team of

Join Jeff Corwin on Wildlife Nation as he races to save threatened gopher tortoises in central Florida. A new real estate development threatens their habitat, prompting Jeff and a team of conservationists to relocate these vital creatures before construction starts. Discover how gopher tortoises are keystone species, providing essential habitat for many other animals, including the iconic eastern indigo snake and the venomous eastern diamondback rattlesnake, thus supporting Florida's entire ecosystem.

Jeff Corwin teams up with Defenders of Wildlife to highlight North American wildlife and the dedicated individuals protecting them. Check local listings for airtime. To learn more, visit www.defenders.org/wildlifenation.

Join Jeff Corwin on an Alaskan adventure for "Wildlife Nation," exploring the state's incredible animals and vital conservation efforts. The episode features monitoring endangered beluga whales in

Join Jeff Corwin on an Alaskan adventure for "Wildlife Nation," exploring the state's incredible animals and vital conservation efforts. The episode features monitoring endangered beluga whales in Cook Inlet, observing American bison managed by the Alutiiq people on Kodiak Islands, and studying the critical western bumblebee.

This conservation mission, in partnership with Defenders of Wildlife, highlights North America's creatures and the dedicated individuals protecting them. Check local listings for airtime.

For more about the featured wildlife, visit www.defenders.org/wildlifenation.

Join Jeff Corwin on "Wildlife Nation" for an Alaskan adventure, connecting with iconic North American brown bears. He observes these magnificent creatures, including a mother with cubs, hunting

Join Jeff Corwin on "Wildlife Nation" for an Alaskan adventure, connecting with iconic North American brown bears. He observes these magnificent creatures, including a mother with cubs, hunting for salmon, and discovers how this vital resource helps them become so big.

The journey highlights how people and bears coexist, and the efforts of conservationists, including Defenders of Wildlife, to manage and sustain salmon for future generations. Witness the incredible struggles and successes of these animals and the dedicated work to protect them.

Join Jeff Corwin on "Wildlife Nation" as he explores the world of turtles. He journeys to southern Florida to rescue gopher tortoises from a land development project, relocating them to protected

Join Jeff Corwin on "Wildlife Nation" as he explores the world of turtles. He journeys to southern Florida to rescue gopher tortoises from a land development project, relocating them to protected habitats. Corwin also dives with endangered green sea turtles off the Atlantic coast to assist scientists with population monitoring and saves a tiny terrapin in a Massachusetts wetland marsh.

Teaming up with Defenders of Wildlife, Jeff celebrates North America's incredible creatures and dedicated conservationists. You're invited to join this adventure!

Join Jeff Corwin on "Wildlife Nation" as he celebrates the Endangered Species Act and the dedicated men and women of American conservation. The program highlights the landmark legislation's

Join Jeff Corwin on "Wildlife Nation" as he celebrates the Endangered Species Act and the dedicated men and women of American conservation. The program highlights the landmark legislation's success by connecting with amazing species that have benefited from its protection.

Corwin assists conservationists in returning baby sea turtles to the ocean, catalogs baby crocodiles in the Florida Keys, and aids peregrine falcon recovery in New England. Teaming up with Defenders of Wildlife, Corwin invites viewers to join the adventure and witness the vital work protecting North America's iconic wildlife.

Promoting walkability enhances citizen well-being, fosters business, and creates more liveable urban environments by encouraging walking and biking over driving.

City planner and urban

Promoting walkability enhances citizen well-being, fosters business, and creates more liveable urban environments by encouraging walking and biking over driving.

City planner and urban designer Jeff Speck champions walkability and sustainable design. He is the bestselling author of "Walkable City: How Downtown Can Save America, One Step at a Time."

This video, featuring Jeff Speck, was recorded on April 8, 2015, in Lahti, Finland. The event was organized by Aalto University Professional Development, The Regional Council of Päijät-Häme, and the City of Lahti, with partial funding from the European Regional Development Fund. Follow Jeff on Twitter or order his book.

Urbanist Jeff Speck addresses the problem of suburban car dependence, which he calls "a gas-belching, time-wasting, life-threatening prosthetic device." He proposes making cities more walkable and

Urbanist Jeff Speck addresses the problem of suburban car dependence, which he calls "a gas-belching, time-wasting, life-threatening prosthetic device." He proposes making cities more walkable and pleasant to free people from reliance on cars.

Speck highlights Portland, Oregon's early commitment to bicycles and walkability in the 1970s as a successful model. This TEDTalks presentation, published on October 14, 2013, advocates for Portland's "new way" of urban development.

Find closed captions and translated subtitles at http://www.ted.com/translate.