February, 1879 – First Woolworth store opens in Utica, New York

Frank Woolworth's five-and-dime retail stores became one of the world's most successful trading companies with branches in many countries around the world.

February, 1954 – The first mass inoculation against polio conducted

Virologist Jonas Salk's vaccine is still one of the two versions used today, along with Hilary Koprowski's live polio vaccine.

February, 1582 – Pope Gregory XIII ordered the introduction of the Gregorian calendar

Luigi Lilio's reform of the Julian calendar was first introduced in some European countries and is now the world's most widely used calendar.

February, 1964 – Muhammad Ali became the world heavyweight champion

Ali, who still used his original name Cassius Clay at the time, is considered as one of the greatest heavyweight boxers in history.

February, 1991 – The world's first web browser presented to the public

The browser “Worldwide Web” (later renamed “Nexus”) was developed by Tim Berners-Lee, a British computer scientist best known as the inventor of the internet.

February, 1932 – The neutron discovered

English physicist James Chadwick was later awarded the Nobel Prize for his discovery.

February, 1935 – Nylon invented

Wallace Carothers first produced the polymer at the DuPont Experimental Station in Wilmington, Delaware, United States.