Some of the best known species on Earth may not be what they seem. Credit...Steve Holroyd/Alamy Supported by By Carl Zimmer Naturalists have been trying for centuries to catalog all of the species on ...

In the penultimate episode of Crash Course Zoology, we use everything we've learned so far to try and figure out what a "species" even is anyway! As you'll see, the incredible diversity of animals ...

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Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

The question of what defines a species has vexed scientists across the ages, particularly in conservation, where decisions require a firm understanding of biodiversity. When you purchase through links ...

A bumpy snailfish, Andean mouse opossum and ancient sea cow were just some of the many species described in 2025.

When a species comes off the Endangered Species Act list, is that the end of the story? No. While a win is a win, it’s never the end; responsibility for these species often shifts to states, Tribes, ...

This year marks the 50th anniversary of the Endangered Species Act. It was the most comprehensive legislation for preserving species at risk of extinction and made the United States a global leader in ...

If you thought that pesky honeysuckle growing behind the garage or the neighbor’s tree of heaven seeding into your veggie patch was an annoying problem, you’re not alone. Across the globe, the problem ...

To biologists, a "species" is the fundamental unit of categorization for life on Earth and a key tool for protecting living creatures. When you purchase through links on our site, we may earn an ...