In the Eighteenth century, explorers set out to catalog the variety of life on Earth... Until then, even educated people believed in mythological creatures lurking outside the relative safety of their home environments. Today, there are two million documented species on Earth. Richard Conniff, Guggenheim Fellow and Guest Columnist for the New York Times discusses his new book "The Species Seekers: Heroes, Fools, and the Mad Pursuit of Life On Earth".
Richard Coniff's blog on the subject - Species Seekers