Looks at SETI's validity as a research programme and examines recent attempts to contact other intelligent life forms. Also assesses theories on the origin of life on Earth, discoveries of former solar planets and proposals for space colonies.
Originally published in 1990, this study of the moral problems bound up with transplant therapy addresses a finely balanced distinction between ethical issues relating to its experimental nature on the one hand and those which arise when transplantation is routine on the other.
Originally published 1988 by Croom Helm.