Today in History: July 5, Dolly the sheep marks cloning breakthrough

In 1687, Isaac Newton first published his Principia Mathematica, a three-volume work setting out his mathematical principles of natural philosophy.

In 1811, Venezuela became the first South American country to declare independence from Spain.

In 1852, Frederick Douglass delivered his speech "What to the Slave is the Fourth of July?" at Corinthian Hall in Rochester, N.Y.

In 1865, the Secret Service Division of the Treasury Department was founded in Washington, D.C., with the mission of suppressing counterfeit currency.

In 1935, President Franklin D. Roosevelt signed the National Labor Relations Act.

In 1937, Hormel introduced a canned meat product called Spam; more than 9 billion cans have been sold since.

In 1940, during World War II, Britain and the Vichy government in France broke off diplomatic relations.

In 1943, the Battle of Kursk began during World War II; in the weeks that followed, the Soviets were able to repeatedly repel the Germans, who eventually withdrew in defeat.

In 1946, the modern bikini, designed by Frenchman Louis Reard, was first modeled in Paris.

In 1947, Larry Doby made his debut with the Cleveland Indians, becoming the first Black player in the American League three months after Jackie Robinson broke the color barrier in the National League.

In 1954, Elvis Presley recorded his first single, "That's All Right," at Sun Studio in Memphis.

In 1971, President Nixon certified the 26th Amendment to the Constitution, which lowered the minimum voting age from 21 to 18.

In 1975, Arthur Ashe became the first Black man to win a Wimbledon singles title, defeating Jimmy Connors.

In 1977, Pakistan's army, led by General Mohammad Zia ul-Haq, seized power from President Zulfikar Ali Bhutto.

In 1980, Bjorn Borg became the first male player to win five consecutive Wimbledon singles titles.

In 1994, Amazon was founded by Jeff Bezos as an online marketplace for books.

In 1996, Dolly the sheep, the first mammal cloned from an adult somatic cell by scientists at the Roslin Institute at the University of Edinburgh, was born.

In 2013, Pope Francis cleared two of the 20th Century's most influential popes to become saints in the Roman Catholic church, approving a miracle needed to canonize Pope John Paul II and waiving Vatican rules to honor Pope John XXIII.