A rat forages for food in the Lower 9th Ward of New Orleans in 2006, a year after Hurricane Katrina. Blighted buildings and fewer people led to an increase in the city's rat population. Alex Brandon/AP hide caption

A skier glides past a snow-making machine pumping out snow in Weston, Mass., in 2010. Bill Sikes/AP hide caption

Enroll America outreach workers talk to congregants at the Mt. Calvary Church in Jacksonville, Fla. Eric Whitney hide caption

A woman and her child are barred from a supermarket that was closing its doors to ration milk products in Caracas on Nov. 15. Venezuela's President Nicolas Maduro, who was elected after the death of Hugo Chavez in March, is facing growing criticism over economic problems that include shortages of basic goods and inflation that's topped 50 percent this year. Jorge Silva/Reuters/Landov hide caption

Cobblestone ice has made travel downright dangerous. Over the weekend, Ross Hailey of the Fort Worth Star-Telegram captured this truck driving over cobblestone ice in Haltom City. Ross Hailey/Star-Telegram via KERA hide caption