23 mar 1667 año - Using a microscope, Robert Hooke discovers what cork is made from and that it floats.
Descripción:
 Various specimens are inspected by Robert Hooke with his microscope and publishes his results in Micrographia. Among his many observations were a description of cork and how it can float in water. 
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fecha:
23 mar 1667 año
Ahora mismo
 ~ 358 years ago