Inventions and Discoveries Developed Simultaneously Throughout History

In 1922, a pair of Columbia University sociologists named William Ogburn and Dorothy Thomas published a paper entitled “Are Inventions Inevitable?” which stated that Ogburn and Thomas discovered 148 examples of documented simultaneous invention. This phenomena occurred in 1876, when Alexander Graham Bell and Elisha Gray filed for a patent for the telephone on the same day with Bell’s unit having a separated listening and talking piece whilst Gray’s unit having a single listening and talking unit built into a conical structure. Other notable examples include Charles Darwin and Alfred Russel Wallace who came up with the Theory of Evolution simultaneously, Carl Scheele and Joseph Priestly who discovered oxygen at the same time, Isaac Newton and Gottfried Leibniz who discovered and developed calculus at the same time, Dmitri Mendeleev and Alexandre-Émile Béguyer de Chancourtois who discovered and developed the periodic table at the same time, and Orville and Wilbur Wright and Samuel Langley who invented the airplane during the same period of time. Knowing this, it would seem that the phenomena of simultaneous invention and discovery seems to be exceedingly common for human beings throughout history

How Birthdays are Celebrated Within Vietnam and the Tết Nguyên Đán Holiday

In Vietnam, every person celebrates their birthday on the same day of the year, which is Tết Nguyên Đán (pronounced “tet!/tut! hwin dawn” with the exclamation marks denoting that “tết” is a strong sounding term with emphasis), the Vietnamese New Year. Instead of celebrating individual birthdays, the Vietnamese celebrate birthdays simultaneously by collectively adding a year to their age upon this date. Tết Nguyên Đán is predicated upon the lunisolar calendar, which involves both lunar and solar events, and because of this, Tết Nguyên Đán occurs between January and February, marked by the first new moon after January 21st but before February 20th. It should be noted, some Vietnamese have chosen not to observe this tradition, and therefore celebrate their individual birthday upon the date of its anniversary, with this practice becoming much more common during the modern day, however because Tết Nguyên Đán is the most important holiday within Vietnam, the practice is still ascribed to