Permission to quote from the Science magazine issue of 28 September 1990 (vol. 249, p. 1503) was graciously given by the American Association for the Advancement of Science and by the author of the article, Leslie Roberts.
The lyrics quoted are from “Space Oddity,” words and music by David Bowie, copyright © 1969 by Westminster Music Ltd. London; TRO-Essex Music International Inc., New York, owns all publication rights for the USA and Canada. Used by permission.
“Ashes to Ashes,” by David Bowie, permission granted by Isolar, New York.
“Rocket Man,” by Elton John and Bernie Taupin, copyright © 1972 Songs of PolyGram International, Inc.