 The film grossed $6 million over the Friday-Sunday period, reaching eighth place at the box office, and taking somewhat less than "Earth"s $8.8 million, but taking more than "March of the Penguins".It was the third highest-grossing opening for a documentary film.Despite grossing an additional $4 million over the week, the film collapsed 57% in its second weekend, a steeper drop than its predecessor, taking in $2.6 million from 1,210 theaters.