Large crystals found in geodes and other rocks are relatively rare ... Minerals and gems are classified by their physical properties, including hardness, luster, color, density, and magnetism.

Their findings, published in Science Advances, suggest that the properties of rocks may contribute equally to the generation ...

Schools around the world have closed to prevent the spread of COVID-19, leaving parents and teachers scrambling to figure out how kids can learn at home. We can help! Science News Explores and the ...