What is the function of roller in a mouse?

What is a flat column projecting from the wall of a building? True or False Sand covers about 50 percent of most deserts? How many cars cross the tay road bridge per year? Why did the mariana trench form? How long is the colossus ride at thorpe park? How is Mississippi and Arkansas alike? How long would it take to kayak from il to the gulf of Mexico? How long average limo? Where is the North Carolina Aquarium Society in Raleigh North Carolina located? What ocean is mount Fuji by? Where is chlifa located? What natural wonder extends 3500 miles from the Atlantic ocean to the red sea? Why did Robert De Crevecoeur built Leeds Castle? What is the desert in southwestern Australia called? Where is the Ellsinore Pioneer Museum in Ellsinore Missouri located? How are the three forest biomes alike and how are they different? Is Mount Rushmore an abstract noun? Did the Nile River go through mountains? What is the name of the ocean between Antarctica and Africa? How high above sea level is clearlake California?