John W. Farrell is a writer and producer working in Boston. He is the author of The Clock and the Camshaft: And Other Medieval Inventions We Still Can't Live Without from Prometheus Books, and The Day Without Yesterday: Lemaître, Einstein and the Birth of Modern Cosmology from Basic Books, an imprint of the Perseus Books Group. A graduate of Harvard College with a B.A. in English and American Literature, Farrell has written for Aeon, New Scientist, Commonweal, The Wall Street Journal, The Guardian, The Boston Globe, Salon, National Review and Nautilus. He was a 2010 Templeton-Cambridge Journalism Fellow in Science and Religion.