The Moon is thought to have formed when an object roughly the size of Mars hit the Earth. The impact was so violent that it threw large amounts of the Earth's mantle into orbit. This material evenually coalesced and formed the Moon.
Ansel Easton Adams was an American photographer and environmentalist. His black-and-white landscape photographs of the American West, especially Yosemite National Park, have been widely reproduced on calendars, posters, and in books.
Ansel Adams wrote of an inevitable conflict between the accuracy of color film and people's subjective reaction to colors. (Excerpted from the book Ansel Adams in Color. Copyright Â© 1993, 2009 by Trustees of The Ansel Adams Publishing Rights Trust. Reprinted with permission of Little, Brown and Company)