Pluto the "Unexplored Planet" --Yes! It's a Planet: Could It Have Astrobiological Potential? (Weekend Feature)

News reports Friday said that scientists from the Harvard-Smithsonian Center for Astrophysics have begun pushing back on the notion that Pluto is a dwarf. "Humankind hasn't had an experience like this--an encounter with a new planet--in a long time," says...