1. OCEANOGRAPHY. A raised ridge of water that moves across the surface of an ocean or a lake. Waves are caused by the winds, currents or tidal forces, or combinations of these. 2. PHYSICS. A vibrating motion or a rapidly changing electromagnetic field that passes through a medium such as…

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Earth Day eBook SaleWednesday April 11, 2018

Earth Day eBook Sale

I am so pleased that HarperCollins is doing a special promotion with two of my books for Earth Day. Between now and April 23, the eBook editions of two of my books, GLOBAL WARMING and WILDFIRES, will be on sale for just 99¢…

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