Arches National Park is located in Utah. Situated in the southeastern part of the state near the city of Moab, it is known for having the highest density of natural sandstone arches in the world. The park covers over 76,000 acres and features more than 2,000 of these natural structures.

An ice hockey team has six players on the ice at one time: one goaltender and five skaters (three forwards and two defensemen), though rosters are much larger, often around 20-25 players to allow for substitutions and injuries, with up to 20 dressed for a game.

John Grisham is the author of the legal thriller novels "The Chamber", "The Client", and "The Firm". A former attorney, Grisham has written numerous international bestsellers, many of which were adapted into major motion pictures, including these three titles, along with The Pelican Brief and A Time to Kill.

Japan is the primary country with organized, competitive office chair racing, known as the ISU-1 Grand Prix. Started in 2009, these endurance races involve 3-person teams navigating a 200-meter course for 2 hours, often in shopping districts across more than 20 cities. 

The soft, white or pale yellow, sticky film that constantly forms on teeth is called dental plaque. It consists of bacteria, food particles, and saliva. If not removed daily through brushing and flossing, this bacterial film can harden into tartar (calculus) within 24 to 72 hours.