Scientists Puzzle Over Pluto's Polygons

New pictures relayed by the first spacecraft to visit distant Pluto show odd, polygon-shaped features and smooth hills in an crater-free plain, indications that the icy world is geologically active, New Horizons scientists said Friday. "We had no idea that Pluto would have a geologically young surface," said lead researcher Alan Stern, with the Southwest Research Institute in Boulder, Colorado. "It's a wonderful surprise." The goal of the $720 million New...

© La Voix de l'Amérique - vendredi 17 juillet 2015