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In 2006 the term "planet" was redefined and Pluto no longer fit the definition. Britannica has come out with a new book to help students understand this change. New Views of the Solar System looks at scientists' changing perspectives on the solar system, with articles on Pluto, the eight chief planets, and dwarf planets that illustrate this "new view." On Sale Now.
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Photograph:Lance Armstrong (in yellow) nearing the end of the Tour de France bicycle race in 2005. He won the …

Sport & Steroids

Lance Armstrong, pictured here in the 2005 Tour de France, won the race a record seven consecutive times. With the 2007 Tour now under way, Britannica surveys the history of the race and of cycling in general, showing how the rise of cycling was tied to improvements in road construction. At the Britannica Blog, Dr. Gary Gaffney discusses the steroid scandals tainting the Tour and cycling as a professional sport. Features Archive

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Biography of the Day

Gough Whitlam.Born this day in 1916, Australian Labor leader Gough Whitlam was dismissed as prime minister in 1975 after refusing to call new elections to end a parliamentary deadlock brought on by falling support for his administration.

This Day in History

Aaron Burr, oil painting by John Vanderlyn, 1809; in the collection of the New-York Historical …Outraged over disparaging remarks that Alexander Hamilton had allegedly made at a dinner party, Aaron Burr challenged his longtime rival to a duel, and on this day in 1804 he fatally shot Hamilton in Weehawken, New Jersey.
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Ross BookFrom developing content that is easily adaptable to other cultures to closing a publishing deal, this in-depth look at the world of publishing in the 21st century is an indispensable guide for anyone looking to make it in our increasingly global community. Publishing Without Boundaries: How to Think, Work, and Win in the Global Marketplace is written by Britannica Senior Vice President Michael Ross.

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Muhammad Ali Muhammad Ali was one of the greatest boxers in history and also, in his prime, one of the most controversial. But have the earlier chapters in Ali’s life been sanitized for the public to maximize his economic potential? Thomas Hauser, acclaimed biographer and author of Britannica’s entry on Ali, asks this very question in The Lost Legacy of Muhammad Ali, a book available from the Britannica Store.

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Muhammad Ali