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?
Plate tectonics
xPlate tectonics : The theory supported by a wide range of evidence that considers the Earth's crust and upper mantle to be composed of several large, thin, relatively rigid plates that move relative to one another.
The Earth's mantle is a rocky, solid shell that is between the Earth's crust and the outer core. The mantle is made up of many different reservoirs that have different chemical compositions. Scientists...Read more