Delve into the details of the Quaternary Period of the Cenozoic Era, which presents enlightening scientific data about the present-day ice age and the evolving planet.

An encyclopedia article on feminism that discusses its history in the ancient world, the influence of the Enlightenment, the suffrage movement, contemporary feminism in the West and the globalization of feminism.

Catherine II, called Catherine the Great, reigned as Empress of Russia for 34 years, from 9 July [O.S. 28 June] 1762 until her death. Marrying into the Russian Imperial family, she came to power with the deposition of her husband Peter...