#e <t>plague<d>550(50)<n>bubonic plague<c>Middle East<info>This epidemic killed an estimated 100 million people in the Middle East, Europe, and Asia during the 6th century.
#e <t>plague<d>1347<e>1351<n>Black Death<c>Europe<info>This outbreak of the Bubonic plague killed one-fourth to one-half the population of Europe, or about 75 million people.
#e <t>medical<d>1500<c>Switzerland<n>first "successful" Caesarian delivery<info>the first recorded in which both mother and child survived
#e <t>disc<d>1848 May<n>racemism<au>Pasteur<info>Louis Pasteur discovers chemical handedness (racemism).
#e <t>extinction<n>great auk<d>1850
#e <t>pub<n>Darwin<tit>On the Origin of Species<d>1859
// 20th century
#p <nat>American<o>biologist<n>Jonas Salk<b>1914 Oct 28<d>1995 Jun 23<c>New York City
#p <nat>American<o>biologist<n>Edward O. Wilson<sur>E. O. Wilson<c>Alabama<b>1929 Jun 10
#e <t>invent<d>1947<n>human defibrillation<c>Cleveland<info>by Claude S. Beck
#e <t>medical<au>Salk<n>polio vaccine<d>1955
#e <t>coin<d>1992<n>"biodiversity"<au>E. O. Wilson
#e <t><d>1998 Dec 20<n>octuplets born<c>Houston<info>The octuplets are six girls and two boys. One girl was born earlier than the others, on December 8. One of the girls, who was the lightest at birth, weighing less than a pound, died about a week later.