Invasive species are non-native species that have been introduced to an ecosystem and have established there causing ecological damage. The study of invasive species involves questions about the ...

Unsure which sea animals and plants will cause you harm? Take a look at a few species to avoid when you tread water.

All garnets have essentially the same crystal structure, but they vary in chemical composition. There are more than twenty garnet categories, called species, but only five are commercially important ...

Birthstones are a fun, popular and colorful introduction to the world of gemstones. They appeal to audiences around the world regardless of gender, age, nationality or religion. Birthstones carry ...