Biological experiments: The viking Mars lander

A Production of Amino Acids Under Possible Primitive Earth Conditions

Stanley L. Miller · Science · 1953 · 3.4K citations

Engineering, Amino Acids, Atomic Emission Spectroscopy +22

Evidence for Extraterrestrial Amino-acids and Hydrocarbons in the Murchison Meteorite

Keith A. Kvenvolden, James G. Lawless, Katherine L. Pering et al. · Nature · 1970 · 832 citations

Organic Geochemistry, Biosignature, Engineering +5

A Physical Basis for Life Detection Experiments

J. E. Lovelock · Nature · 1965 · 447 citations

Biology, Biosignature, Environmental Monitoring +4

Microwave Detection of Interstellar Formaldehyde

Lewis E. Snyder, D. Bühl, B. Zuckerman et al. · Physical Review Letters · 1969 · 397 citations

Widespread Distribution, Microwave Spectroscopy, Engineering +12

Intelligent life in the Universe

E. Öpik · Planetary and Space Science · 1967 · 331 citations

Cognitive Science, Extraterrestrial Intelligence, Human-like Intelligence +5