Seeing Creation and Evolution in Grand Canyon

Two groups examining the same evidence. Traveling nearly identical itineraries, snoozing under the same stars and bathing in the same chocolate-colored river. Yet, standing at opposite ends of the growing creation-evolution debate, they seemed to speak in different tongues.

The twin rafting trips epitomize the parallel universes often inhabited by Americans with polarized positions. Members of both groups said they had signed up for these charters to be surrounded by like-minded people. Indeed, all the American adults on Mr. Vail's boats voted for President Bush last fall, while all but two on the evolutionists' rafts cast ballots for Senator John Kerry.

When not running the rapids, Mr. Vail's group, which included three pastors, sat in makeshift sanctuaries of sand and stone to offer psalms and prayers of praise for their surroundings.

Mr. Vail, whose book on the Grand Canyon scientists tried to ban from park stores last year, describes this natural wonder as "Exhibit A" for Young Earth creationists. Dr. Scott calls it a scientists' Louvre.