Earlier this month, a U.S. satellite known as F17 — which was primarily used for meteorological measurements — experienced operational failures that compromised the integrity of its data.

Baltimore stands apart as the American big city with the most deaths caused by air pollution, and Curtis Bay is its dirtiest community.

Nuclear catastrophe is always an unmitigated disaster. The only beneficiaries, albeit in a perverse fashion, are animals, which tend to flourish in areas humans evacuate.

The world’s count of wild tigers roaming forests from Russia to Vietnam has gone up for the first time in more than a century, with some 3,890 counted by conservation groups and national government

California is in a unique predicament, and it’s one of the reasons the state continues to suffer from long-term exceptional drought.

The Amazon has it bad, but the Cerrado may have it even worse. After all, at least you’ve actually heard of the Amazon.

It’s hard to imagine the tropical Pacific lacking for water.

Air pollution in the U.S. may be causing thousands of premature births each year, a new study suggests — costing the nation billions of dollars along the way.

Scientists have declared that key portions of the Great Barrier Reef — over a thousand miles long and the “largest living structure on the planet,” according to Australia’s Great Barrier Reef Marin

General Director of the World Health Organization (WHO), Margaret Chan, gives an update on the Zika virus in Geneva, Switzerland. (EPA/Salvatore Di Nolfi)