Brian Gongol
Galileo Galilei
1452 - born
1477 - opens his own workshop (about age 25)
1503 - begins painting the Mona Lisa (about age 49)
Galileo Galilei
1564 - born
1588 - becomes lecturer in mathematics (about age 24)
1592 - becomes chair of mathematics at University of Padua (about age 28)
1593 - invents a hydraulic pump (about age 29)
1602 - begins experiments with the pendulum (about age 38)
1606 - invents primitive thermometer (about age 42)
1607 - discovers parabolic path of projectiles (about age 43)
1610 - discovers three moons of Jupiter (about age 46)
1633 - placed under house arrest for writing about heliocentricity (about age 69)
1641 - conceives the idea of a pendulum clock (about age 77)
Isaac Newton
1642 - born
1668 - shares method of integration by infinite series with friends (about age 26)
1687 - publishes Principia Mathematica (about age 45)
Benjamin Franklin
1706 - born
1732 - starts publishing "Poor Richard's Almanac" (about age 26)
1752 - conducts kite experiment (about age 46)
Thomas Jefferson
1743 - born
1768 - starts building Monticello (about age 25)
1776 - writes Declaration of Independence (about age 33)
Benjamin Disraeli
1804 - born
1826 - writes first novel (about age 22)
1868 - becomes Prime Minister of Great Britain (age 63)
Mark Twain (Samuel Clemens)
1835 - born
1876 - publishes "Tom Sawyer" (about age 41)
1884 - publishes "The Adventures of Huckleberry Finn" (about age 49)
Thomas Edison
1847 - born
1869 - undertakes inventing full-time (about age 22)
1876 - opens research laboratory at Menlo Park (age 29)
1879 - demonstrates incandescent light bulb (about age 32)
1882 - supervises installation of Manhattan electric power system (about age 35)
Alexander Graham Bell
1847 - born
1876 - invents and demonstrates telephone (about age 29)
Nikola Tesla
1856 - born
1887 - files seven patents for AC motors and power transmission (about age 31)
1890 - demonstrates wireless transmission of electricity (about age 44)
1893 - demonstrates AC power on large scale at Columbian Exposition (about age 37)
1896 - completes Niagara Falls hydroelectric power plant (about age 40)
1897 - files patent on basic radio transmission (about age 41)
1898 - demonstrates radio-controlled robotics (about age 42)
Theodore Roosevelt
1858 - born
1889 - writes "The Winning of the West" (about age 31)
1898 - elected governor of New York (about age 40)
1901 - inaugurated President (age 42)
Winston Churchill
1874 - born
1898 - publishes first books (about age 24)
1900 - elected to Parliament (about age 26)
1911 - appointed First Lord of the Admiralty (about age 37)
1940 - becomes Prime Minister of Great Britain (age 65)
Albert Einstein
1879 - born
1905 - publishes first paper on theory of relativity (about age 26)
Barry Goldwater
1909 - born
1960 - writes "Conscience of a Conservative" (age 51)
1964 - runs for President (age 55)
Milton Friedman
1912 - born
1940 - completes doctoral dissertation (about age 28)
1962 - writes "Capitalism and Freedom" (about age 50)
1963 - writes "A Monetary History of the United States" (about age 51)
Margaret Thatcher
1925 - born
1959 - elected to Parliament (age 34)
1979 - becomes Prime Minister of Great Britain (age 53)
Warren Buffett
1930 - born
1945 - buys 40 acres of farmland (age 14)
1964 - personal net worth about $4 million (about age 34)
1965 - takes over Berkshire Hathaway (about age 35)