Two polar bears spar on the shoreline of the Hudson Bay in November 2007.
Credit Paul J. Richards / AFP/Getty Images
Federal agents interviewed new witnesses this week in an ongoing investigation of government scientists that's been called "polar bear-gate," according to the scientists' lawyer.
The controversial probe, now entering its third year, is looking into allegations of scientific misconduct related to a 2006 report by wildlife researchers Charles Monnett and Jeffrey Gleason, who described seeing dead polar bears floating in Arctic waters.
A wobbling of the Earth on its axis about 20,000 years ago may have kicked off a beginning to the end of the last ice age. Glaciers in the Arctic and Greenland began to melt, which resulted in a warming of the Earth, a new study says. Above, Greenland's Russell Glacier, seen in 1990.
The last big ice age ended about 11,000 years ago, and not a moment too soon — it made a lot more of the world livable, at least for humans.
But exactly what caused the big thaw isn't clear, and new research suggests that a wobble in the Earth kicked off a complicated process that changed the whole planet.
Ice tells the history of the Earth's climate: Air bubbles in ice reveal what the atmosphere was like and what the temperature was. And scientists can read this ice, even if it's been buried for thousands of years.
This NASA map shows the size of aerosol particles in the atmosphere. Green areas indicate larger, more naturally occurring particles like dust. Red areas indicate smaller aerosol particles, which can come from fossil fuels and fires. Yellow areas indicate a mix of large and small particles.
Windsor is one of several cities and towns along the Front Range that’s experiencing a surge in oil and gas drilling and the controversial practice of hydraulic fracturing, and some residents worried about the impacts of the boom are planning to gather at a public forum there Wednesday night.
Climatologists at Colorado State University are warning that 98% of the state is under drought conditions. This poses all kinds of concerns for the state’s recreation economy, and for water managers, whose job it is to secure water for five million people in a mostly arid state.