Harvard Book Store, the Harvard University Division of Science, the Harvard Library, and Long Now Boston welcome Andrew H. Knoll 鈥� Fisher Research Professor of Natural History and Earth and Planetary Sciences, Emeritus, at Harvard University, and author of A Brief History of Earth and Life on a Young Planet 鈥� for a discussion of his new book Earth and Life: A Four Billion Year Conversation. He will be joined in conversation by Robin Wordsworth 鈥� Gordon McKay Professor of Environmental Science and Engineering, Professor of Earth and Planetary Sciences, and Co-Director of Graduate Studies at Harvard University. This event will take place at the Harvard Geological Museum.