Levene enrolled at Columbia University and in his spare time conducted biochemical research, publishing papers on the chemical structure of sugars. In 1896 he was appointed as an Associate in the Pathological Institute of the New York State Hospitals, but he had to take time off to recuperate from tuberculosis.
This graph shows the median age of the resident population of the United States from 1960 to 2015. In 2015, the median age of the United States population was approximately 37.7 years.
Population: Census 2010 Total Population: 19,821: 2010 Demographic Profile: 2016 Population Estimate (as of July 1, 2016) N/A: 2016 Population Estimates: 2016 ACS 5-Year Population Estimate: 20,011: 2012-2016 American Community Survey 5-Year Estimates: Median Age: 45.9: 2012-2016 American Community Survey 5-Year Estimates : Number of Companies: 2,334