Cathy Whitlock co-authored the study on the ancient trees found in Wyoming. (Submitted by Cathy Whitlock) She says about 5,000 years ago, the climate started to cool and an ice patch developed.

The ice column is the length of six Empire State buildings. It represents ancient record of the Earth's climate and the story of a once warm Antarctica before it morphed into a snowy desert.

Landslides have uncovered the remnants of an ancient glacier on Bylot Island in the Canadian Arctic. Buried within the permafrost, researchers believe this is the oldest glacier ice ever found in ...

Curiosity has discovered ancient lakes that were free of ice, offering an important insight into the planet's early climate." More information: Claire A. Mondro et al, Wave ripples formed in ...