| Leeuwenhoek made groundbreaking observations in andrology by describing spermatozoa. |
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| Graaf's efforts introduced Leeuwenhoek to the most important learned society of the time. |
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| In 1683, Leeuwenhoek presented another famous communication on bacteria found in saliva and tooth scrapings from his mouth. |
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| Leeuwenhoek tried ingenious ways to estimate the size of his animalcules. |
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| Before long Dutchman Antonie Leeuwenhoek became the first scientist to notice virgin births in female aphids or green flies. |
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