Neil deGrasse Tyson Discusses The Pluto Files @ The Commonwealth Club - 02/05/09 Part 2 of 7

From: BuggreAlleThis

Added: 17 years ago · 10:01 · 480p

In support of his book The Pluto Files, Neil DeGrasse Tyson discusses the chain of events that led to Pluto's fall from grace at the ...