Until I read the "The Resilient Earth" by coauthors Hoffman and Simmons, I did not spend much time thinking about the issue of human-caused global warming. I knew there were those who claimed humans were destroying our planet and there were others who did not agree, and challenged that principle. Now, after reading this wonderful book, I do care about our planet, but I have become somewhat skeptical of the idea that humans can change the climate to the point that we are doomed. In Chapter 1, the first lines in the book read: "Scientists observe nature, then develop theories that describe their observations. Science is driven by nature itself, and nature gives us no choice. It is what it is." How beautiful those words are, and they set the tone of the entire book. I have learned how resilient our Earth is - from its very beginning to its present day. The book is a journey of science and scientific discovery. I was amazed how many scientists made discoveries outside their disciplines. As an example, a man named Joseph Fourier discovered that certain gases could trap heat. Fourier, a mathematician and physicist, made that discovery in 1829. The book describes just how complex Earth's atmosphere is, and that it takes almost all scientific disciplines to try and unravel nature's mysteries. I learned how important the roles of geology, paleontology, glaciology, oceanography, physics, chemistry, and many more disciplines play in understanding, not only the complex puzzle called our atmosphere, but also the history of our planet. Most importantly, I learned how Earth warmed and cooled in cycles, long before modern man arrived. Best told was the story of Otzi the Iceman, who died in 3300 BC and his perfectly preserved body was found in 1991, buried in ice on the Italian Alps. Otzi laid in peace during the rise and fall of the Roman Empire, WW II, and the rise of the United States. What I learned from Otzi, made me think of Greenland. Why was that place, now covered in ice, called "Greenland?" This book influenced my life. I now recycle plastic and paper. I raised my thermostat for summer and lowered it for winter. I use less water. But I learned, reading this treasure of information, that it takes 226 million years for our solar system to make one orbit around the center of our galaxy. That puts the whole climate issue in perspective. Who can imagine what we might run into as we porpoise and sashay on our 226 million year journey. The easy style and anecdotes of "The Resilient Earth" are gems. I recommend this book for everyone. It will open the mind and make one think of things never thought of before. Such as, how lucky we humans are to have survived the ebb and flow of ice on this resilient Earth. Imagine New York City buried under ice, a mile high. I wonder how many times that happened, and could it happen again. Nature, with its infinite reach, will decide that for us. Kudos for the authors of "The Resilient Earth."