DMITRY MENDELEEV PUBLISHED HIS PERIODIC TABLE 150 YEARS AGO

DMITRY MENDELEEV PUBLISHED HIS PERIODIC TABLE 150 YEARS AGO

Russian chemistry professor Dmitri Mendeleev published his periodic table in 1869. Mendeleev’s table, dated March 1 1869, was his first published version. He constructed his tables by listing the elements in rows or columns in order of atomic weight and starting a new row or column when the characteristics of the elements began to repeat.

PENICILLIN DISCOVERED 90 YEARS AGO

PENICILLIN DISCOVERED 90 YEARS AGO

Sir Alexander Fleming, a Scottish researcher, is credited with the discovery of penicillin in 1928. At the time, Fleming was experimenting with the influenza virus in the Laboratory of the Inoculation Department at St. Mary’s Hospital in London.

SIR ISAAC NEWTON’S 375 ANNIVERSARY

SIR ISAAC NEWTON’S 375 ANNIVERSARY

Isaac Newton (January 4, 1643 to March 31, 1727) was a physicist and mathematician who developed the principles of modern physics, including the laws of motion, and is credited as one of the great minds of the 17th century Scientific Revolution. In 1687, he published his most acclaimed work, Mathematical Principles of Natural Philosophy, which has been called the single […]

MARIE CURIE’S 150 ANNIVERSARY

MARIE CURIE’S 150 ANNIVERSARY

Marie Curie, Maria Sklodowska, was born in Warsaw on November 7, 1867, the daughter of a secondary-school teacher. She received a general education in local schools and some scientific training from her father. She became involved in a students’ revolutionary organization and found it prudent to leave Warsaw then for Cracow, which at that time was under Austrian rule.