Cactus leather can be used for handbags, shoes, furniture, and more. We look at its environmental impact and how it compares to cotton and leather.

A Brief History of Zoos Humans have kept wild animals for thousands of years. The first efforts to keep wild animals for non-utilitarian uses began about 2,500 BCE, when rulers in Mesopotamia ...

Artush / Getty Images The largest alligator ever measured was 15 feet, nine inches long, and weighed in at 1,011.5 pounds. This gator was caught in Mill Creek, a tributary of a river in Alabama ...

Roberta Murray / Uncommon Depth / Getty Images The taiga is not an easy place for amphibians to live, thanks to its cold winters and short summers, but a few still eke out a living here. One is ...

Marcus V. Bellizzi / Wikimedia Commons / CC BY-SA 3.0 This tree, an example of the species Cariniana legalis named Patriarca da Floresta in Brazil, is estimated to be over 2,000 years old. The ...

From New York's Eternal Flame Falls to Ethiopia's Erta Ale, these naturally occurring eternal flames have been burning for decades or centuries.

Palm oil is cheap and comes from a highly efficient oil palm crop that produces generous yields, year-round, with relatively little land. Yet, it can be horribly unsustainable. Demand for the ...

Textiles are recyclable. Here's some important info on how to recycle your old clothes, sheets, towels, and more—plus, smart and eco-friendly ways to repurpose them.

Animal testing remains legal in most of the world. Learn how the practice began—and is still performed—and how to know if your favorite cosmetics have been tested on animals.

Pollinators aren’t the only bugs that can help your garden. Learn what beneficial insects can do for your garden and how to coexist with them.

Freder / Getty Images A conservationist by the name of Hector Ceballos-Lascurain is often credited with the first definition of ecotourism in 1987, that is, “tourism that consists in travelling ...

A modular is a portable home or commercial building that is built at an off-site facility and transported to a more permanent plot for assembly. The product can be of higher quality because it's ...