"What if?" questions stimulate people to think in new ways, to refresh old ideas, and to make new discoveries. In What If the Earth Had Two Moons, Neil Comins leads us on a fascinating ten-world journey as we explore what our planet would be like under alternative astronomical conditions. In each case, the Earth would be different, often in surprising ways. The title chapter, for example, gives us a second moon orbiting closer to Earth than the one we have now. The night sky is a lot brighter, but that won't last forever. Eventually the moons collide, with one extra-massive moon emerging after a period during which Earth sports a Saturn-like ring. This and nine and other speculative essays provide us with insights into the Earth as it exists today, while shedding new light on the burgeoning search for life on planets orbiting other stars. Appealing to adult and young adult alike, this book is a fascinating journey through physics and astronomy, and follows on the author's previous bestseller, What if the Moon Didn't Exist?, with completely new scenarios backed by the latest astronomical research.

In Tides: The Science and Spirit of the Ocean, writer, sailor, and surfer Jonathan White takes readers across the globe to discover the science and spirit of ocean tides. In the Arctic, White shimmies under the ice with an Inuit elder to hunt for mussels in the dark cavities left behind at low tide; in China, he races the Silver Dragon, a twenty-five-foot tidal bore that crashes eighty miles up the Qiantang River; in France, he interviews the monks that live in the tide-wrapped monastery of Mont Saint-Michel; in Chile and Scotland, he investigates the growth of tidal power generation; and in Panama and Venice, he delves into how the threat of sea level rise is changing human culture—the very old and very new. Tides combines lyrical prose, colorful adventure travel, and provocative scientific inquiry into the elemental, mysterious paradox that keeps our planet’s waters in constant motion. Photographs, scientific figures, line drawings, and sixteen color photos dramatically illustrate this engaging, expert tour of the tides.

In The Book of Tides, William Thomson took the reader on a mesmerising journey round the coast of Britain. Now, he sets out with his surfboard and tidal compass to encounter the waters of the world, charting his most extraordinary sights and experiences. These include the whirlpools of the Arctic circle, the world's biggest ever surfed wave off Portugal, the strongest whirlpool in Norway and, in Australia, the most dangerous rapids known to us. With the enticing combination of William's passionate text and collectable mapping illustrations, this is a book for anyone who feels the pull of the tides and call of the sea.

Earth Science text for middle school students. Beautifully designed and illustrated in accordance with our signature mastery-based teaching philosophy. 15 chapters, covering all the basic Earth Science topics, including the evidence for an old earth and support for the scientific concensus of human-caused climate change.

From Cnut to D-Day: the history and science of the unceasing tide explored for the first time. Half of the world's population lives in coastal regions lapped by tidal waters. Yet how little most of us know about the tide. Our ability to predict and understand the tide depends on centuries of science, from the observations of Aristotle and the theories of Newton to today's supercomputer calculations. This story is punctuated here by notable tidal episodes in history, from Caesar's thwarted invasion of Britain to the catastrophic flooding of Venice, and interwoven with a rich folklore that continues to inspire art and literature today. With Aldersey-Williams as our guide to the most feared and celebrated tidal features on the planet, from the original maelstrøm in Scandinavia to the world's highest tides in Nova Scotia to the crumbling coast of East Anglia, the importance of the tide, and the way it has shaped - and will continue to shape - our civilization, becomes startlingly clear.

Ebb and Flow was named one of 2007's "best science books" by Peter Calamai, science editor of the Toronto Star [Dec. 30, 2007]. He calls it a "wonderful resource book.... Tom Koppel seems to have visited or read about every place with unusual tides and water currents, yet he wears this scholarship lightly." Tides have shaped our world. They have carved out shorelines, transformed early life on Earth, and altered the course of human civilization. Tides frustrated Alexander the Great and Julius Caesar, and aided General MacArthur. They govern the way our planet moves, provide us with an alternative source of energy, and may be aggravating global climate change. Drawing on science, history, and personal memories, Koppel's fascinating book engages and enlightens, demonstrating that a subject we take for granted affects all our lives. He weaves together three grand narratives, exploring how tides impact coasts and marine life, how they have altered human history and development, and how science has striven to understand the surprisingly complex way in which tides actually work.