What does an Expanding Universe Mean? (Closer to Truth)

# automatic playing for the 4 videos (click the up-left corner for the list)

source: Closer To Truth 上次更新: 20160404

Alan Guth - What Does an Expanding Universe Mean? 5:37
Andrei Linde - What Does an Expanding Universe Mean? 9:27
Saul Perlmutter - What Does an Expanding Universe Mean? 3:08
George Ellis - What Does an Expanding Universe Mean? 12:48