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Not only was the past decade the warmest on record, but climate indicators being tracked globally are worsening, scientists reported Wednesday in their annual "State of the Climate."
Despite their tiny size, plant plankton found in the world's oceans are crucial to much of life on Earth. They are the foundation of the bountiful marine food web, produce half the world's oxygen and suck up harmful carbon dioxide.
Despite setbacks on Capitol Hill, President Barack Obama said Tuesday he still supports the need for broad climate legislation.
Longer summers are causing marmots -- which are large, ground-dwelling squirrels -- to become heftier, heartier and more plentiful, according to a 33-year study published in the latest issue of Nature.
Senate Democrats are giving up on plans to pass an energy bill that caps emissions of carbon dioxide, saying Republicans refuse to support the measure.