This early microbiologist used a swan-necked flask to help disprove the Theory of Spontaneous Generation.

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Louis Pasteur used a swan-necked flask in his experiments to disprove the Theory of Spontaneous Generation. The curved neck of the flask allowed air to enter but prevented microorganisms from entering and contaminating the broth inside, proving that microorganisms did not spontaneously generate but instead came from external sources.

This Early Microbiologist Used a Swan-Necked Flask to Help Disprove