Chemical structure of DNA discovered
On February 28, 1953, Cambridge University scientists James D. Watson and Francis H.C. Crick announce that they have determined the double-helix structure of DNA, the molecule containing human genes. The molecular biologists were aided significantly by the work of another DNA researcher, Rosalind Franklin, although she is not included in the announcement, nor did she share the subsequent Nobel Prize award for it.
Though DNA—short for deoxyribonucleic acid—was discovered in 1869, its crucial role in determining genetic inheritance wasn’t demonstrated until 1943. In the early 1950s, Watson and Crick were only two of many scientists working on figuring out the structure of DNA. California chemist Linus Pauling suggested an incorrect model at the beginning of 1953, prompting Watson and Crick to try and beat Pauling at his own game.
On the morning of February 28, they determined that the structure of DNA was a double-helix polymer, or a spiral of two DNA strands, each containing a long chain of monomer nucleotides, wound around each other. According to their findings, DNA replicated itself by separating into individual strands, each of which became the template for a new double helix. In his best-selling book, The Double Helix (1968), Watson later claimed that Crick announced the discovery by walking into the nearby Eagle Pub and blurting out that “we had found the secret of life.” The truth wasn’t that far off, as Watson and Crick had solved a fundamental mystery of science–how it was possible for genetic instructions to be held inside organisms and passed from generation to generation.
Watson and Crick’s solution was formally announced on April 25, 1953, following its publication in that month’s issue of Nature magazine. The article revolutionized the study of biology and medicine. Among the developments that followed directly from it were pre-natal screening for disease genes; genetically engineered foods; the ability to identify human remains; the rational design of treatments for diseases such as AIDS; and the accurate testing of physical evidence in order to convict or exonerate criminals.
Crick and Watson later had a falling-out over Watson’s book, which Crick felt misrepresented their collaboration and betrayed their friendship.
A larger controversy arose over the use Watson and Crick made of work done by another DNA researcher, Rosalind Franklin. Colleague Maurice Wilkins showed Watson and Crick Franklin's X-ray photographic work to Watson just before he and Crick made their famous discovery. The imagery established that the DNA molecule existed in a helical conformation. When Crick and Watson won the Nobel Prize in 1962, they shared it with Wilkins. Franklin, who died in 1958 of ovarian cancer and was thus ineligible for the award, never learned of the role her photos played in the historic scientific breakthrough.
SPORTS
1986
MLB commissioner suspends players in drug scandal
On February 28, 1986, Major League Baseball commissioner Peter Ueberroth suspends 11 players. including some of the sport's biggest names, for their involvement with illegal drugs. The suspensions are the most severe in the baseball since the infamous "Black Sox Scandal" in 1919.
RELIGION
2013
Pope Benedict resigns
On February 28, 2013, less than three weeks after making the unexpected announcement that he would step down, 85-year-old Pope Benedict XVI officially resigns. Citing advanced age as the reason for giving up his post as the leader of the 1.2 billion-member Roman Catholic Church, Benedict was the first pontiff to relinquish power in nearly 600 years. Two weeks after Benedict resigned, Cardinal Jorge Mario Bergoglio, the archbishop of Buenos Aires, was elected pope.
1990S
1994
First NATO Military Action
In the first military action in the 45-year history of the North Atlantic Treaty Organization (NATO), U.S. fighter planes shoot down four Serbian warplanes engaged in a bombing mission in violation of Bosnia’s no-fly zone. The United States, 10 European countries, and Canada founded NATO in 1949 as a safeguard against Soviet aggression. With the end of the Cold War, NATO members approved the use of its military forces for peacekeeping missions in countries outside the alliance and in 1994 agreed to enforce U.N. resolutions enacted to bring about an end to the bloody conflict in the former Yugoslavia. In 1994 and 1995, NATO planes enforced the no-fly zone over Bosnia-Herzegovina and struck at Bosnian Serb military positions and airfields on a number of occasions.
ART, LITERATURE, AND FILM HISTORY
1982
Getty Museum endowed
On February 28, 1982, the J. Paul Getty Museum becomes the most richly endowed museum on earth when it receives a $1.2 billion bequest left to it by the late J. Paul Getty. The American oil billionaire died in 1976, but legal wrangling over his fortune by his children and ex-wives kept his will in probate until 1982. During those six years, what was a originally a $700 million bequest to the museum nearly doubled. By 2000, the endowment was worth $5 billion–even after the trust spent nearly $1 billion in the 1990s on the construction of a massive museum and arts education complex in Los Angeles.
1990S
1993
ATF raids Branch Davidian compound
At Mount Carmel in Waco, Texas, agents of the U.S. Treasury Department’s Bureau of Alcohol, Tobacco, and Firearms (ATF) launch a raid against the Branch Davidian compound as part of an investigation into illegal possession of firearms and explosives by the Christian cult.
U.S. PRESIDENTS
1844
Tyler narrowly escapes death on the USS Princeton
On February 28, 1844, President John Tyler cruises the Potomac with 400 others aboard the U.S. Navy’s new steam frigate USS Princeton, not realizing that his life will soon be in danger. In attendance that day were political dignitaries and their guests, which included the the wealthy New Yorker David Gardiner and his two daughters. The 54-year-old Tyler, a recent widower, had fallen for Gardiner’s youngest, the lovely 20-year-old Julia, to whom he had proposed marriage. She had not yet responded.
WESTWARD EXPANSION
1861
Congress creates Colorado Territory
With the region’s white population booming because of the Pike’s Peak gold rush, Congress creates the new Territory of Colorado. When the United States acquired it after the Mexican War ended in 1848, the land that would one day become Colorado was nearly unpopulated by Anglo settlers. Ute, Arapaho, Cheyenne and other Native Americans had occupied the land for centuries, but the Europeans who had made sporadic appearances there since the 17th century never stayed for long. It was not until 1851 that the first permanent non-Indigenous settlement was established, in the San Luis Valley.
ART, LITERATURE, AND FILM HISTORY
1983
Final episode of M*A*S*H airs
On February 28, 1983, the celebrated sitcom M*A*S*H bows out after 11 seasons, airing a special two-and-a-half hour episode watched by 77 percent of the television viewing audience. It was the largest percentage ever to watch a single TV show up to that time.
COLD WAR
1987
Gorbachev calls for nuclear weapons treaty
In a surprising announcement, Soviet leader Mikhail Gorbachev indicates that his nation is ready to sign “without delay” a treaty designed to eliminate U.S. and Soviet medium-range nuclear missiles from Europe. Gorbachev’s offer led to a breakthrough in negotiations and, eventually, to the signing of the Intermediate-Range Nuclear Forces (INF) Treaty in December 1987.
AMERICAN REVOLUTION
1784
John Wesley charters first Methodist Church in U.S.
On February 28, 1784, John Wesley charters the first Methodist Church in the United States. Despite the fact that he was an Anglican, Wesley saw the need to provide church structure for his followers after the Anglican Church abandoned its American believers during the American Revolution.
WORLD WAR II
1944
Test pilot Reitsch pitches suicide squad to Hitler
Hanna Reitsch, the first female test pilot in the world, suggests the creation of the Nazi equivalent of a kamikaze squad of suicide bombers while visiting Adolf Hitler in Berchtesgaden. Hitler was less than enthusiastic about the idea.
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