TODAY'S HISTORY: In 1876, Alexander Graham Bell received the patent for the telephone. In 1936, Adolf Hitler ordered German troops to reoccupy the Rhineland, defying the Treaty of Versailles. In 1965, state troopers forcefully broke up 600 civil rights protesters on "Bloody Sunday" in Selma, Alabama. In 1985, the song "We Are the World" was released worldwide, with sales to benefit African famine relief. In 2009, the Kepler space observatory, designed by NASA to discover Earthlike planets, was launched from Cape Canaveral, Florida. TODAY'S BIRTHDAYS: John Herschel (1792-1871), mathematician/astronomer; Luther Burbank (1849-1926), botanist; Maurice Ravel (1875-1937), composer; Willard Scott (1934- ), TV personality; Bryan Cranston (1956- ), actor; Ivan Lendl (1960- ), tennis player; Wanda Sykes (1964- ), actress/comedian; Rachel Weisz (1970- ), actress; Peter Sarsgaard (1971- ), actor; Jenna Fischer (1974- ), actress; Laura Prepon (1980- ), actress. TODAY'S FACT: Astronomers at the Harvard-Smithsonian Center for Astrophysics used data from the Kepler space observatory to estimate that at least 17 billion Earth-sized exoplanets exist in the Milky Way galaxy. TODAY'S SPORTS: In 1987, 20-year-old Mike Tyson defeated James "Bonecrusher" Smith to unify the World Boxing Association and World Boxing Council titles, becoming the youngest undisputed heavyweight champion in history. TODAY'S QUOTE: "To the natural philosopher there is no natural object unimportant or trifling. From the least of nature's works he may learn the greatest lessons." -- John Herschel, "A Preliminary Discourse on the Study of Natural Philosophy" TODAY'S NUMBER: 72,197 -- number of Americans who were 100 years or older in 2014, according to the Centers for Disease Control and Prevention. TODAY'S MOON: Between full moon (March 1) and last quarter moon (March 9).