We will admit that, out of the mud or sand which is found on the seashore or the beds of our rivers, at low water, shellfish or testaceous animals come forth, but it does not from thence by any means follow that they are produced without any regular course of generation.

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• Antonie van Leeuwenhoek:

  For my part, I hold it equally impossible for a small shellfish to be produced without generation a

• Antonie van Leeuwenhoek:

  I have often endeavoured to view the circulation of the blood in terrestrial animals, but without s

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  Life lives on life - it is cruel, but it is God's will. And it is for our good, of course, because

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  For my part, I would say that the male sperm and seeds of plants have been penetrated so far that t

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  Man comes not from an egg but from an animalcule that is found in male sperm.