What is a roller polley?

How long on an average would it take to sail from Jamaica through the Panama Canal to Vancouver BC? Why is the air in a forest usually humid? Why was cabots propsed northerly route across the Atlantic ocean better than the route Columbus took across the middle of the Atlantic ocean? Which countries are affected by mass tourism? How can a season pass for Six Flags be obtained? What is under the sand on the beach? Are the DC musems open during the 4th of July holiday? How old is Skoga River Waterfalls? Did Rain forest kingdoms traded copper salt and leather goods for food and crafts from the savannas? Mission san Rafael mission church? What is Big Bens latitude? What did immigants do on Ellis Island? Is there a way to drive from Phoenix to Las Vegas and bypass the Hoover Dam? How many locks and dams are located on your rivers in Pittsburgh? How old Abigail Adams was when the Revolutionary War began? Which river is longest - the Missouri the Mississippi or Arkansas? Is david livingstone the first person to discover Victoria falls? How many Black Sea bass are left? Did the sphinx guard anything? How many times does the M25 go over the river Thames?