How much does a social worker make? According to the May 2012 records from the Bureau of Labor Statistics, the mean annual healthcare social worker salary is $51,460, or $24.74 per hour. The lowest ten percent earn $31,410, while the top ten percent make an average of $74,030 annually.
The Leibniz Step Reckoner. Gottfried Leibnizâs 1673 âStep Reckonerâ introduced a design innovation that enabled a single gear to represent any digit from 0 to 9 in just one revolution. This stepped-drum approach dominated calculator design for the next two centuries. Gottfried Leibniz.
Auriga The Charioteer. Hephaestus impregnated Mother Earth with a child, Erichthonius, who was born with the lower body of a snake. Athena pitied the boy and raised him as her own son in the city of Athens where he eventually became king. He became famous for developing the four horse chariot.