Summary
1. Molecular signatures that operate without living cells
"Maybe it's the very molecules that the live cells were using, just doing their thing without the cells." – greenbit
2. Distinguishing biological vs. geological explanations
"hardly anything grows there, almost 50 years later." – buildsjets
"They said specifically that it were a cesium‑137 source." – tucnak
3. Prebiotic chemistry and the origins of life
"The other 11 amino‑acids from proteins have never been found where life does not exist." – adrian_b