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.
One of the most famous expressionists is the Dutch painter Vincent Van Gogh (1853-1890). His paintings seem to vibrate with emotion. Van Gogh suffered mental illness and died by his own hand.