The (environmental) meaning of Christmas. David Biello reports

Physics Nobel laureate and U.S. energy secretary, Steven Chu, offers his thoughts on the paired challenge of climate change and clean energy in Cancun. David Biello reports

After Copenhagen, the world reconvenes to try to combat climate change. David Biello reports

Doom and gloom doesn't motivate action on environmental problems, but is there hope for behavior change? David Biello reports

What impact did the Great Recession have on climate change? David Biello reports

The International Council for Science has narrowed down five top challenges the world needs to meet in order to sustain our planet. Christie Nicholson reports

Soil samples taken from a 50-mile radius around the Macondo well reveal striped layers of thick goo, possibly containing oil. Christie Nicholson reports

A woman from Hancock, Maine, discovered that a tourist snapshot of a humpback whale on Flickr matched with photos documented in the Allied Whale research catalogue, providing proof that this whale had traveled 6,000 miles, the longest documented distance of any humpback. Christie Nicholson reports

Despite being the voice of the world's flora and fauna, will the delegates at the 10th meeting of the U.N. Convention on Biological Diversity actually bring real change? David Biello reports

The innovative research and development program known as ARPA-e is in imminent danger of losing funding--and putting the U.S. even further behind in its bid for a clean-energy economy. David Biello reports