Pope Francis 's long-awaited visit to Argentina, his homeland, appears increasingly unlikely as he battles double pneumonia.

Part of the system that pumps water, heat and nutrients around the globe is at risk. Climate change could slow the Antarctic ...

POPE FRANCIS I: (Through interpreter) Brothers and sisters, Jesus Christ is risen. He alone has the power to roll away the stone that blocks the path of life.

"It costs quite a bit of money to travel north to get these snow conditions," Fisher told ABC News. "The warmer temperatures ...