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Published February 18, 1966 | public
Journal Article

The Search for Extraterrestrial Life


Present knowledge does not permit the conclusion that, if life ever existed on Mars, it is now extinct.

Additional Information

© 1966 American Association for the Advancement of Science. I am indebted to Dr. Paul Howard-Flanders and Richard W. Davies for helpful discussions in regard to radiation fluxes at Mars.

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August 19, 2023
October 25, 2023