National Park Service researchers recorded ambient sound from all over the country to find out where there’s still stillness. David Biello reports

Life thrives even deep inside Earth and scientists are beginning to suspect extensive connections among those underground environments. David Biello reports

The long-term winter warming of Russia’s far north has gotten a boost from industrialization. David Biello reports

The biggest single source of global warming pollution actually started to shrink in 2014. David Biello reports

The value of recycling depends on the material in question and whether all hidden costs and benefits go into the analysis. David Biello reports

Desire for gold has made mining in tropical forests financially worthwhile, leading to ecosystem destruction. Cynthia Graber reports

Low oil prices present an opportunity to come to grips with our crumbling infrastructure and the cost of climate change. David Biello reports

Researchers announced the discovery of 98 beetle species previously unknown to science. David Biello reports

The Sundarbans, part of the world's largest mangrove forest and stretching across India and Bangladesh, have been tarnished by a 350,000-liter oil spill. David Biello reports

Good news for gas and oil consumers can be bad news for the environment. David Biello reports