The mortar used in The Great Wall of China that is one of the New 7 Wonders of the World was made with sticky rice.
Workers built the Ming dynasty sections of the Great Wall about 600 years ago by mixing a paste of sticky rice flour and slaked lime, the standard ingredient in mortar. The sticky rice mortar bound the bricks together so tightly that in many places weeds still cannot grow.
Sweden experimented with a practice that drivers who drove under the speed limit would have won a lottery where funds come from the fines paid by speeders. The average speed limit was reduced by 22 percent.
The only continent with no active volcanoes is Australia.
The Yamato dynasty of Japan traces its origins to 660 A.D., making them the oldest continuous hereditary monarchy in the world.
There are no rivers in Saudi Arabia.