Explore key issues and ideas in urban design and planning, including bike infrastructure, Vision Zero, walkability, density, and more.

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Seal fact: These animals, also known as pinnipeds, make up three diverse groups of semi-aquatic carnivorous marine mammals. Constituting the most species-rich clade of living marine mammals, there ...

Learn how to clean up your beauty routine with safe, non-toxic makeup and skincare products that really work.

Deepen your understanding of the natural world by learning about biology, chemistry, physics, and geology.

Mary Jo DiLonardo has worked in print, online, and broadcast journalism for 25 years and covers nature, health, science, and animals. Toucans are popular and unmistakable animals—whether they're ...

Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama. Cottonwoods are poplars native to North America, Europe, and western Asia.