Extraterrestrial intelligence and galactic nuclear activity

Intelligent life in the Universe

E. Öpik · Planetary and Space Science · 1967 · 333 citations

Natural Sciences, Astronomy, Physics +12

Possible Consequences of Nearby Supernova Explosions for Atmospheric Ozone and Terrestrial Life

M. Ruderman · Science · 1974 · 193 citations

Natural Sciences, Astronomy, Physics +13

Extraterrestrial intelligent beings do not exist

Frank J. Tipler · Physics Today · 1981 · 99 citations

Natural Sciences, Astronomy, Gravitation +6

Extraterrestrial intelligent beings do not exist

Frank J. Tipler · Quarterly journal of the Royal Astronomical Society · 1980 · 67 citations

Natural Sciences, Astronomy, Gravitation +6

Frequency of nearby supernovae and climatic and biological catastrophes

D. H. Clark, W. H. McCrea, F. R. Stephenson · Nature · 1977 · 57 citations

Natural Sciences, Astronomy, Physics +10