Did you know that the Maya and the Aztecs were early observers of Venus?
Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
Ooids
xOoids : Small (< 2 mm), spheroidal, layered sedimentary grains, usually composed of calcium carbonate, but sometimes made up of iron- or phosphate-based minerals.
Scientists who study plants in the Sonoran Desert are worried about global warming. While desert winters have become warmer and drier over the years, climate changes have pushed the arrival of winter rains...Read more