Louis Pasteur’s Swan-Neck Flask: The Experiment That Killed “Spontaneous Generation”
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Louis Pasteur’s Swan-Neck Flask: The Experiment That Killed “Spontaneous Generation”
In 1861, Louis Pasteur boils nutrient broth in swan-neck glass so air can enter—but dust cannot. The broth stays clear until the neck is snapped and particles drop in, and then it rots on schedule. In one elegant setup, spontaneous generation collapses and germ theory gains teeth. A dramatic science moment proving the invisible has a source.
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