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The discovery of blood cells in the human body paved the way for advanced studies in cell biology. Early discovery of genes in volved in human development by Edward Lewis, Christine Nusslein and Eric Wieschaus in 1995 is a clear demonstration of the importance of microscopes in the life sciences.
â¢ Had to have a microscope first. o Invented in 1595 by Zacharias Janssen  Was considered a toy for the rich. â¢ Anton Van Leeuwenhoek 1670âs o Improved the microscope so much heâs considered the father of the microscope. o First looked at water under a microscope o Discovered small animals.