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Alessandro Volta (1745-1827) was a great friend of Galvani, and his efforts to show the theory of animal electricity later resulted in his invention of the voltaic pile aka the first electric battery. The term volt, a unit of electrical measurement, is named in his honor.

Volta was born in Como, Italy (near Milan). In 1774, he began his first academic position as principal of the state Gymnasium in Como.

In 1777, he was appointed Professor of Physics at the University of Pavia. Here he began to repeat Galvani's famous experiments with decapitated frogs. He observed that Galvani had connected brass hooks between the frog's spinal cord and an iron railing. According to Volta's interpretation, the muscle twitches were induced by current flowing between two dissimilar metals connected by the moist flesh of the frog's leg. This led him to develop the first device which demonstrated chemical production of electric current.

In 1799, Volta arranged a vertical pile of metal discs (zinc with copper or silver) and separated them from each other with paperboard discs that had been soaked in saline solution. This stack became known as the voltaic pile and was the progenitor formodern alkaline batteries.

In his pursuit of the current generated by his primitive batteries, Volta developed several new devices. He invented the electrophore, a forerunner of the capacitor; the condensatore, a device that detected weak electrical current; and the straw electrometer, a meteorology tool which measured atmospheric electricity.

In 1801, Volta was summoned to Paris to demonstrate his discovery before the Academy of Sciences. Napoleon declared his presentation a triumph, awarded him a gold medal and initiated the annual Volta Prize in his honor.

En Hedu' Anna lived in Babylon at 2354 BC. Hes father (sargon) was the ruler. En Gedu' was a important role she was the priestess which means she could name any new ruler to the cdity she was the only one. She observes the stars and ther moon. She make the first calendar!

Jabir Ibn Haiyan was a Arab. He died in 803 he was 103 when he died so he was born in the late 700s. His birthday is not known. He is considered the father of modern chimistery. He helped us by making steel, dyeing of cloth and prevention of rust.