Neil deGrasse Tyson a great astrologist speaks about alien life

See this interesting video about Aliens and UFO

You can read his testimony

here http://www.spaceref.com/news/viewpr.html?pid=5492

Neil deGrasse Tyson (born October 5, 1958 in New York City) is an American physicist and astrophysicist.He is particularly concerned with the birth and death of stars, dwarf galaxies and the shape of the Milky Way.