Description: Photos in the Science Service collection documenting Herbert Hoover's historic acceptance of the Presidential nomination with live radio coverage.
Description: Henry David Hubbard (1870-1943), a physicist at the U.S. National Bureau of Standards, designed the first edition of the "Periodic Chart of the Atoms" in 1924. The chart is still in use today, continually updated to reflect new elements.
Description: On June 11, 1927, 25-year-old Charles Lindbergh, and his plane Spirit of St. Louis, arrived back in the United States, and Washington, D.C. threw a party.
Description: To celebrate Women’s History Month, here are two examples of 20th-century women who applied their education and expertise in geology and paleontology outside traditional university career paths.