nypost.com — Lou LumenickBlog: Movies MOVIE REVIEW TO THE ARCTICRunning time: 40 minutes. Rated G. At the Lincoln Square IMAX, Broadway and 68th Street. The rapid shrinking of the Arctic's ice cap due to global warming "has left polar bears on thin ice,'' narrator Meryl Streep informs us in this superficial 3-D documentary from four-decade IMAX veteran Greg MacGillivray.