The Lifeboat Foundation: Human Rescue Service -  .

Beyond the Holocaust - Survival or Extinction? - - Subtitled "A survival manual for humanity", this online book attempts to summarise problems threatening humanity's very survival, their causes and possible solutions to them.

Book: The End of the World - The Science and Ethics of Human Extinction - - by Prof. John Leslie. The first comprehensive survey of potential catastrophes speculated upon by scientists, from comet and asteroid impacts to nuclear or chemical warfare, from ozone layer destruction to overpopulation and poisoning of the environment or the risk of disaster through genetic engineering. Also covers philosophy and ethics. 199.

Existential Risks - - Paper by Nick Bostrom, analyzing well-known and less well-known extinction risks and related crippling hazards to humanity.

The Future Watch - - The site intended to prevent the cataclysmic end-of-the-world scenarios caused by advancing technology. Articles, news and media references.

Musing on Beginning and End - - Thoughts on the enormity of the cosmos and the life cycle of civilizations, including our own.

Remarks on the Doomsday Argument - - Questions if people are underestimating the likelihood of human extinction in the next few decades, a position put forward by the philosophical Carter-Leslie doomsday argument. Highly philosophical and statistical.

The Universal Extinction Constant - - The site author, Alan J Bessant, introduces his thesis and promotes understanding of the Universal Extinction Constant and Extinction Threat Level.

Salon - X Stands for Extinction - - A physician warns that humans could go the way of the dinosaurs if they don't face up to the threat of killer viruses. (March, 1997)