Carbonaceous chondrites contain amino acids.
Formation, structure of Earth - 4.7 billion years old, planetesimal bombardment, oldest rocks, 3.6 billion years ago, oldest fossils 3.3 billion years old. Viking lander 1976, Rover 1997. Antarctic meteorite controversial evidence for life Gas giants - Jupiter, Saturn, Uranus, Neptune. The answer may be that the neutrinos convert to undetected from as the stream from Sun to Earth.