By Alton K. Marsh, from AOPA NEWS
http://www.aopa.org/aircraft/articles/2009/091203solar.html?WT.mc_id=&wtmcid;&WT.mc_sect=gan
Solar Impulse, an aircraft developed in Switzerland to eventually fly on solar power both day and night, made its first test hop on battery power alone in early December. The solar panels were disconnected for the test flight at Switzerland’s Dübendorf Airfield.
The plan is to complete testing, make ocean-spanning [...]

Constanza.- The “Aguas Blancas” natural waterfall, located in El Convento de la Ciudad de Constanza, is a beautiful Cascade, whose main characteristic is their frozen waters, as if we were in the North Pole.