Changes in population growth and composition, including aging and urbanization, could significantly affect global emissions of carbon dioxide says a new study in PNAS.

El Niño and La Niña are counterparts in the El Niño-Southern Oscillation (ENSO), a cyclic warming and cooling of the eastern and central Pacific Ocean that exerts a major influence on global weather patterns, but they are not mirror images.

Scientists, policymakers, and regional leaders presented the National Climate Adaptation Summit Report to President Obama's science and technology advisor, John Holdren.

Veterans in the Boulder-Denver area will be the focus of a job fair on Tuesday, October 19, from 9:00 a.m. to 3:00 p.m. A number of area companies need to fill about 200 positions over the next 6 to 12 months in a broad range of fields.