April 16 1900 - The first book of postage stamps was issued. The two-cent stamps were available in books of 12, 24 and 48 stamps.
April 16 1912 - Harriet Quimby became the first woman to fly across the English Channel.
April 16 1922 - Annie Oakley shot 100 clay targets in a row, to set a women’s record.
April 16 1943 - In Basel, Switzerland, chemist Albert Hoffman accidently discovered the the hallucinogenic effects of LSD-25 while working on the medicinal value of lysergic acid.
April 16 1947 - The Zoomar lens, invented by Dr. Frank Back, was demonstrated in New York City. It was the first lens to exhibit zooming effects.
April 16 1951 - 75 people were killed when the British submarine Affray sank in the English Channel.
April 16 1953 - The British royal yacht Britannia was launched.
April 16 1968 - The Pentagon announced that troops would begin coming home from Vietnam.
April 16 1972 - Apollo 16 blasted off on a voyage to the moon. It was the fifth manned moon landing.
April 16 1996 - Britain’s Prince Andrew and his wife, Sarah, the Duchess of York, announced that they were in the process of getting a divorce.
April 17 1492 - Christopher Columbus signed a contract with Spain to find a passage to Asia and the Indies.
April 17 1521 - Martin Luther was excommunicated from the Roman Catholic Church.
April 17 1629 - Horses were first imported into the colonies by the American Massachusetts Bay Colony.
April 17 1704 - John Campbell published what would eventually become the first successful American newspaper. It was known as the Boston “News-Letter.”
April 17 1875 - The game “snooker” was invented by Sir Neville Chamberlain.
April 17 1964 - Jerrie Mock became first woman to fly an airplane solo around the world.
April 17 1964 - The Ford Motor Company unveiled its new Mustang model.
April 17 1969 - In Los Angeles, Sirhan Sirhan was convicted of assassinating U.S. Senator Robert F. Kennedy.
April 17 1970 - Apollo 13 returned to Earth safely after an on-board accident with an oxygen tank.
April 17 1996 - Erik and Lyle Menendez were sentenced to life in prison without parole for killing their parents.