Dr. Seuss movie "The Lorax" stayed firmly planted at No. 1 on box office charts over the weekend, easily trumping the debut of Walt Disney's expensive sci-fi flick "John Carter."

"The Lorax," an environmental tale about a fuzzy orange creature that guards the trees, held strong in its second weekend, with 39 million dollars in U.S. and Canadian ticket sales.

http://www.youtube.com/watch?v=Gs_Em1XvAiU&feature=fvst

"John Carter" meanwhile, opened in second place with 30.6 million, a low number for a hoped-for blockbuster.

While the 3D space adventure grossed more than double that amount overseas, Disney is left with a big hole to fill just to break even on the mega-budget movie. The film cost an estimated 250 million to produce, plus tens of millions more to market.

"John Carter" is based on a century-old book by Edgar Rice Burroughs, creator of Tarzan. It tells the story of an ex-military captain who is transported to Mars and tries to end the planet's civil war.

http://www.youtube.com/watch?v=xG304cy8YBM&feature=fvst

Comedy "Project X," about three high-school kids who plan a party that spins out of control, pulled together 11.6 million domestically. That landed the movie in third place during its second weekend in theaters.

http://www.youtube.com/watch?v=1Rl1TJG17Wk

The horror flick "Silent House" had a quiet debut, pulling in 7.0 million and taking fourth place. The movie stars Elizabeth Olsen as a young woman trapped inside a lakeside house and unable to contact the outside world.

http://www.youtube.com/watch?v=6yLD4km_d1I