Speaking of Nature: A Sierra Club Knowledge Card deck published by Pomegranate Communications app for iPhone and iPad

The classic sources of insight into the natural world--Muir, Whitman, Emerson, Thoreau--are present in this deck. They are joined by twentieth-century masters of nature writing (Aldo Leopold, Annie Dillard, Peter Matthiessen, Barry Lopez), scientists (Rachel Carson, James D. Watson), activists (David Brower, Dave Foreman), politicians (Stewart Udall, Bill Clinton), and many others with a love of the earth and a way with words. Each of Speaking of Natures 48 screens presents a thoughtful observation on one side; the other provides biographical notes about the speaker. Whether they are Charles Darwins unexpectedly funny words on beetles, Edward Abbeys cranky asperity, or an Ernest Hemingway eulogy for a fellow outdoorsman, these quotations reaffirm our profound connection with Earth and remind us to tread lightly.