Showing results for "Salt" in Earth Sciences

The author of Cod and The Basque History of the World takes an extraordinary look at an ordinary substance — salt, the only rock humans eat — and how it has shaped civilization from the very beginning. Mark Kurlansky has produced a kaleidoscope of history, a multi-layered masterpiece that blends economic, scientific, political, religious, and culinary records into a rich and memorable tale.

More than half a billion years ago, our world was completely covered by glaciers, a "Snowball Earth" that persisted for millions of years. Incredibly, this unimaginable cold led to the remarkable diversification of life on earth known as the Cambrian explosion. With a geologist's eye and a knack for storytelling, Graham Shields explores when and how such inhospitable conditions enabled animals to evolve, radiate, and diversify into our earliest ancestors.

Why a saltwater aquarium? There's nothing more spectacular than the diversity of the ocean. A saltwater aquarium setup allows you to bring a little sample of that spectacle into your own living room. Compared to plain freshwater tanks (which commonly contain goldfish and other lake-bred varieties of fish), there are many more options if you're planning to choose a saltwater aquarium setup. The fish and other ocean creatures you'll be able to host range from beautiful to fascinating to downright weird, some displaying flashy colors while others exude a quiet grace.