Original caption: NASA astronomer Vic Winter observes the planet Mars on his computer monitor on board of Lake Titicaca, the world’s highest navigable lake at 3,810 meters above sea level, located 86 kilometers from the Bolivian capital, La Paz, August 27, 2003. Observers took advantage of the thin atmosphere above the Bolivian highlands and the lake’s distance from urban centers to view Mars reaching its closest distance to Earth in almost 60,000 years, some 55 million kilometers away. REUTERS/David Mercado