Researchers: Climate pledges see world closing on Paris goalScientists say recent pledges by the United States and others could help cap global warming at 2 degrees Celsius by the end of the century.
Small NASA chopper makes 3rd Mars flightFor its third Mars flight, NASA's small Mars chopper flew at speeds and distances well beyond what had ever been previously tested here on Earth.
Climate Challenge Week: Reconstructing the past with scienceTeaming up with NBC’s Climate Challenge this Earth Week, Local 4 meteorologist Paul Gross will answer the most-asked questions about climate change all week long.
