Dazzling map shows worrying temperature rises

More than 15,000 daytime or nighttime temperature records were broken in the United States in March when cities across the country experienced insanely warm weather -- and even global warming naysayers may be staggered by this animated map.

Each pinprick of light seen around the nation represents one broken or tied record in sequence, as reported by NOAA (National Oceanic and Atmospheric Administration) scientists at the National Climatic Data Center. The result is a dazzling use of data that's as beautiful as it is disturbing in its implications for environmental threats. ​