Islamic leaders called for rapid transition from a world economic order based on fossil fuel to one powered by renewable energy.
James Palmer allegedly shot a protected lion known as Cecil with a crossbow in a killing that has outraged conservationists and others.
The Apollo-Soyuz Test Project (ASTP), conducted 40 years ago in July 1975, was the first joint U.S.-Soviet space flight.
The Pope calls for serious and immediate action to address climate change and other environmental crises.
The day addresses drought and desertification, and is meant to help implement the UN Convention to Combat Desertification.
It is recognized by an increasing number of countries as an opportunity to celebrate our world ocean and our personal connection to the sea.
Monsanto's glyphosate, sold as "roundup," is the most widely-used herbicide. In Colombia, however, it's also a weapon of war.
Cuba is breaking new ground in production yields, organic farming techniques, sustainability, and food security.
It's among the universe's first generation of galaxies, from 13.1 billion years ago.
These negotiations take place against the backdrop of increasingly dire predictions about the results of climate change. 2014 was the hottest year on record.