November 25, 2019, 12:58 p.m.
CO2 levels are now the highest they've been since long before modern humans existed.
November 22, 2019, 12:14 p.m.
Being surrounded by trees, grass and shrubs can add years to your life.
November 20, 2019, 9:56 a.m.
The only endemic duck remaining on the Hawaiian islands is back from the brink of genetic extinction.
November 19, 2019, 12:57 p.m.
The 'subtly stunning' songbird needs attention like this to save it from habitat loss, conservationists say.
November 13, 2019, 2:38 p.m.
More than 85% of Venice is submerged as high tides swept into the city, with locals and tourists scrambling for safety.
November 13, 2019, 2:05 p.m.
Initial reports of ice-encrusted enclosures, rotten food and animals sick with infections sparked an international outcry.