What is the most abundant element in the observable universe?
Approximately 74% of the universe is hydrogen. Helium comprises 24%. All the remaining elements make up only 2% of the universe.
The Declaration of Independence and Constitution were both debated and adopted at what is now called Independence Hall in this U.S. city.
Following American independence, the hall became the nation's first capital. The building was also the original home of the Liberty Bell.
What opera by George and Ira Gershwin tells the story of a disabled African-American street beggar in Charleston, South Carolina?
First performed in 1935, the musical featured a cast of classically trained African-American singers—a daring artistic choice at the time. A 1976 revival gave it a renewed popularity, and it is now one of the best known and most frequently performed operas. However, the opera's depiction of African Americans has attracted controversy from the outset.
After a hiatus of 120 years, what game that originated in North America will return to the Summer Olympic Games in 2028 as a medal sport.
Lacrosse is the oldest organized sport in North America, with its origins with the indigenous people of North America as early as the 12th century.
The construction of the fortress of Erebuni in 782 BC marks the founding of this Armenian capital.
Situated along the Hrazdan River, and with a population of over 1 million, Yerevan is the administrative, cultural, and industrial center of the country.
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