Did you know that "megalith" means "big rock", which is certainly a good description of Stonehenge?
Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
Lahar
xLahar : A mudflow or landslide composed of pyroclastic material and water that flows down from a volcano, typically along a river valley. Lahars can be huge, fast, and deadly.
Scientists who study plants in the Sonoran Desert are worried about global warming. Desert winters have become warmer and drier over the years, and climate changes have pushed the arrival of winter rains...Read more