Despite slight gains in population, the Amur leopard is still on the brink of extinction. Katherine Gallagher is a writer and sustainability expert. She holds a B.A. in English Literature from Chapman ...

Alicia is a writer, photographer, and social entrepreneur specializing in sustainable travel, wildlife and nature conservation, and environmentally friendly agriculture and eating. She holds an M.S.

Wolves and humans have a complicated relationship. We often vilify the “Big Bad Wolf” in fiction and real life, but we're also consistently fascinated by these smart, social mammals, and we haven't ...

Gazelles are famously fleet-footed members of the antelope family, living primarily in dry, open habitats like deserts and grasslands. They tend to gather in migratory or nomadic herds, remaining ...

A solar tree is a structure resembling a tree that generates solar energy using photovoltaic (PV) panels. It employs principles of biomimicry, using a natural system—in this case the form of a tree—to ...

Sidney Stevens is a writer and editor for magazines, websites, and books, with a focus on health and environmental issues. Some 400 billion birds share the planet with us, each with its own abundant ...

ULEV is an acronym for Ultra Low Emission Vehicle. ULEVs release emissions that are 50 percent cleaner than the current average year's models. ULEVs take the LEV, Low Emission Vehicle, standard a step ...

Other than their adhesive feet and lasting fame from a series of car insurance commercials, you probably don't know a whole lot about geckos. And yet this category of more than 1,100 lizard species is ...

Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama. These conifers are not native and for the most part have not naturalized to ...

A passive solar-heated home needs no solar panels to heat or cool it. Rather, the energy used to heat and cool a house comes directly from the sun through skylights and windows. Some of that energy is ...

Matt Hickman is an associate editor at The Architect’s Newspaper. His writing has been featured in Curbed, Apartment Therapy, URBAN-X, and more. The longest bridge in the world, in any category, is ...