State the evidence we have for the origin of life from inanimate matter.

The primary evidence for the origin of life from inanimate (non-living) matter comes from the hypothesis proposed by J.B.S. Haldane and its experimental validation by Stanley L. Miller and Harold C. Urey in 1953:

1. Haldane's Hypothesis: Haldane suggested that life arose from simple inorganic molecules present on the primitive Earth. The conditions on early Earth (high temperature, lightning, and a reducing atmosphere containing methane, ammonia, water vapor, and hydrogen) favored the chemical synthesis of simple organic molecules.

1. Miller-Urey Experiment: They assembled an apparatus to simulate the conditions of the primitive Earth. They created an atmosphere containing molecules like methane ($\text{CH}_4$), ammonia ($\text{NH}_3$), hydrogen ($\text{H}_2$), and water vapor ($\text{H}_2\text{O}$) over water, but completely excluded free oxygen ($\text{O}_2$). The mixture was kept at a temperature just below $100^\circ\text{C}$ and electric sparks were passed through it to simulate lightning.

1. Formation of Organic Molecules: At the end of a week, they analyzed the contents and found that about $15\%$ of the carbon (from methane) had been converted to simple organic compounds, including amino acids (the building blocks of proteins). This provided direct experimental evidence that organic molecules essential for life could be synthesized from completely inorganic, inanimate matter.