Examlex
Asteroids are believed to be debris left over from the failure of a planet to form at a distance of about 3 AU from the Sun.
Dorothea Dix
An American activist who, in the 19th century, led efforts to change the treatment of the mentally ill and to reform prisons in the U.S.
Public Institutions
Organizations or establishments funded and operated by the government, serving the public interest.
Mentally Ill
Refers to individuals suffering from mental health disorders that affect their mood, thinking, and behavior.
Population of Free Blacks
The demographic of African Americans who were not enslaved, especially significant before the Civil War in the 19th century United States.
Q2: A collection of small, icy bodies are
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Q20: What is the latest hypothesis for the
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Q35: The evolution of a "high mass star"
Q39: Why is the Cepheid's period related to
Q47: All Terrestrial planets are separated into layers
Q48: The heaviest element created in the big
Q49: The big bang only created hydrogen and
Q63: The jets emitted by compact objects are