Animal Eyes

The earliest microscopes were called flea glasses because they were predominantly used to observe small insects such as fleas! These microscopes were simple in construction, using different shapes and sizes of glass with low power (6x to 10x). They were invented by the Romans.

Matthias Schleiden and Theodor Schwann came up with the cell theory after observing cells for many decades. They determined that all living things are made up of cells, that cells are the basic units of structure, function and physiology, and that living cells can only come from pre-existing cells.

Cocoa was often used for ceremonial occasions like weddings. It was brewed in both Mexican and Aztec culture, but the result was not at all similar to today’s hot chocolate as it was a far more bitter affair.