Students read about the discovery of Pluto in 1930, as they solve math problems.
*On Aug. 24, 2006, Pluto got "demoted" to dwarf planet status. Read more about Pluto's new status at our sister site, Fact Monster.
Farthest from the Sun: Pluto
Excerpted from
The 20th Century
This comprehensive book presents highlights of each decade from the 1900s to the 1990s. It examines the political, economic, social, cultural, scientific, and technological advances of the twentieth century and introduces students to the individuals who made history in each decade.
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