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from the recorded begining to today
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Jan Baptista van Helmont(Belgian scientist)Jan baptist van Helmont recognized the existence of discrete gases and identified Carbon dioxide.
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Zacharias Janssen - molecular expressionsZacharias Janssen created the basic compound microscope.
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Antonie van Leeuwenhoe(Dutch scientist)--Encyclopedia BritticaAnton van Leeuwenhoek made a microscope with a 270X zoom lens and discoverd bacteria,yeast plants and the circulation of blood in a catepillar
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Robert HookeRobert Hooke had invented many things, one of the things he made was the reflective microscope which would reflect light from the sun.
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Robert Brown(Scottish scientist)-- Encylopedia BritticaRobert Brown discovered the basic structure of plant cells and classified many of the different species of plants
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Lorenz Oken-free dictionaryLorenz Oken speculated that plants and animals are made up of tiny living things called "Infusoria".
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Matthias Jacob Scheldien(German botanist)Mathias Schleden hypothezised that plants were made up of cells and recognized the importance of the nucleus in a cell.
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Schwann discovered the digestive enzyme pensin and suggested yeast were tiny plant life organisms. Also said cell theory applied to plants and animals
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Rudolf Albert von Koelliker(swiss embryologist)Albert von Koelliker discovered the different types of microscopic techniques like hardening, sectioning and staining.
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Rudolf Virchow biographyRudolf Virchow was credited for developing cell theory, and was called the "father of pathology"(the study of diseases, cells, nature, etc).
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Louis PasteurLouis pasteur had enhanced the original idea of the germ theory he also developed a vaccine to a chicken virus
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Aristotle biographyAristotle was a greek philosopher that had classified animals into categories such as red-blooded animals and bloodless animals.
(side note he was born 384 B.C.E) -