Got CALICHE? The First Lady will begin the "Save America's Treasures" tour at Grand Canyon National Park. Stops along the four-day journey will include sites such as Lowell Observatory, where Pluto was discovered; the Acoma Pueblo, one of the oldest continuously inhabited villages in the United States; the Southwestern Pieta, an important sculpture representing Mexican-American heritage in one of Albuquerque's oldest neighborhoods; Bandelier National Monument; the Palace of Governors in Santa Fe, which houses the Segesser Hide Paintings; and Mesa Verde National Park. Stasch dropped out to work as a Vista volunteer tutoring high school dropouts on the Papago Indian reservation in southern Arizona. "I don't think my standard of living was even as good as the Native Americans I was working with," Stasch said. "We walked over to the public bathroom that was part of the beauty shop in the center of this very small town. Whenever we wanted to take a bath, we drove into Tucson and snuck into one of the dorms, pretending to be students. [ Ah... the joys of fieldwork... ] The President today announced his intent to appoint Richard S. Lanier to the Cultural Property Advisory Committee. Centuries ago, Palenque in southeastern Mexico was a center of the long-vanished empire. A recently discovered Maya leader's throne and other relics may shed light on a little-known era. In Russia, civic, historical and patriotic groups now organize expeditions to locate and bury remains.,2107,45746-73796-531702-0,00.html A 2.3-million-year-old "tool factory" discovered in Kenya is proof that our pre-human ancestors had more sophisticated technical skills than previously thought, French researchers report in today's Nature. Archeologist Helene Roche and colleagues unearthed more than 2,000 pieces of early tools and refitted them to the stones they were made from.