A volunteer was attempting to feed a tiger when the attack happened.
The 11th-hour effort could forever transform one of Alaska’s crown jewels.
The New Mexico Democrat talks about Trump's awful environmental record, the role of tribes in climate goals and his interest in being the next interior secretary.
People on Twitter hailed footage of the bird sinking its talons into a whopper on a Florida fishing expedition.
You've likely starting ordering more takeout and delivery this year. Experts share their tips for making the habit more eco-friendly.
Solar and wind are energy powerhouses until the sky is dark or the air is still. An ancient source of energy — the tides — could soon offer a predictable alternative.
The food we grow and eat influences every aspect of our cities, our communities and ourselves. But in a world of global food monopolies, how can we future-proof food?
Climate change is making cities unlivable for millions. Surviving rising temperatures means tackling inequality and rethinking who cities are really for.
Some countries are rejecting an obsession with GDP and finding different ways to measure success. Welcome to the happiness economy.
Solar and wind are more reliable in catastrophes –– and we need them to slow the worsening climate crisis.