(Encyclopedia) Bürgi, Joost or Jost, 1552–1632, Swiss mathematician and instrument maker. As the official clockmaker (1579–92) to Duke Wilhelm IV of Hesse-Kassell, he developed the first clock with a…
(Encyclopedia) mantle, portion of the earth's interior lying beneath the crust and above the core. No direct observation of the mantle, or its upper boundary, has been made; its boundaries have been…
Margaret Mead See also People in the NewsRecent Obituaries Related Links Anthropology Archaeology Some Ancient Civilizations American Indian Archaeological Sites…
Biologists, botanists, geneticists, medical scientists, microbiologists, psychiatrists, psychologists, and zoologists Related Links Cloning: Facts and Fallacies Life Science…
Congo: Rulers
Theophile Theodore Joseph Antoine Baron Wahis, governor-general of the Belgian Congo (1900–12) Felix Alexandre Fuch, governor-general of the Belgian Congo (1912–16) Eugene Joseph…
Eratosthenes 276–195 B.C. This Greek astronomer was the first to measure the size of Earth accurately. He determined that the earth's polar diameter was about 7,850 miles. (In fact, the distance is…
Noam Chomsky See also Women Educators and Scholars African-American Scholars and Educators Hispanic-American Leaders and Activists People in the NewsRecent Obituaries…
(Encyclopedia) British Library, national library of Great Britain, located in London; one of the world's great libraries. Long a part of the British Museum, the library collection originated in 1753…
Mother Teresa See also Roman Catholic Pontiffs People in the NewsRecent Obituaries Related Links Christianity Roman Catholic Church Papacy Holidays: Religious and…
