Which of these observations regarding the likelihood of life existing elsewhere in the universe has NOT yet been made?
A) discovery of assemblies of organic molecules into cell-like, self-replicating structures in the soils of Mars and the atmosphere of Venus
B) discovery of long-chain carbon-based molecules in interstellar clouds by radio astronomers
C) manufacture of organic compounds in laboratory simulations of primordial planetary atmospheres
D) discovery of long-chain amino acid protein molecules in meteorites
Correct Answer:
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