Ecology is a branch of biology concerned with the relations between organisms and their environment. Ecologists work to advance ecosystem research and improve knowledge to protect and restore the services of nature. "Ecosystem services" are the many life-sustaining benefits we receive from nature — clean air and water, fertile soil for crop production, pollination and flood control. These ecosystem services are important to our health and well-being, yet they are limited and often taken for granted as being free. (Source: WordNet, EPA / Photo: Flickr)

In memory of species declared extinct in 2018 — plus one we've already lost in 2019

Mysterious Texas canines have 'ghost' DNA of red wolves

Ecologists share their passion for nature in these winning images

Surprising ways animals stock up for winter

The controversy behind the world's next great telescope

11 startling stats about Earth's disappearing wildlife

How biophilia can improve your life

How the fear of wolves benefits ecosystems

Are we headed for a world without turtles?

Why the Great Barrier Reef is in danger

13 amazing antics of ants

The surprising beauty and benefits of driftwood