(Source: David Whelan/flickr)

Animals are are retaining their brown hue all winter as an adaptation to climate change.

(Source: ItzaFineDay/flickr)

Dramatic urbanization to result in more heat-related fatalities in future. 

(Source: U.S. Army Alaska (USARAK)/flickr)

The multitasking activity involves picking up litter while you run.

(Source: US Army Africa/flickr)

The outcome of the highly risky and complicated surgery can be gauged only after a few weeks.

(Source: Prayitno / Thank you for (12 millions +) view/flickr)

Big American cities dominate the list of 25 worst cities for traffic.