Comet Mania
Simon Schaffer, 19 February 1981
“... to comets as the origin of life on Earth in his theory of ‘directed panspermia’; in 1684 the anonymous author of a book called Cometomantia explained that ‘we must expect sickness, diseases, mortality, and more especially the sudden death of Great Ones’, after the passage of a comet; some explained the Great Plague of 1665 by appealing to comets; and ... ”