The oldest known curling stone is more than 500 years old. Curling first became an official Olympic event in 1998. Learn more in Curling, a For the Love of Sports book.
"The Great Lakes contain about 6 quadrillion gallons (23 quadrillion liters) of fresh water. That is enough to cover the entire United States with water 9.5 feet (2.9 meters) deep. Discover more in Great Lakes, one of the titles in the Natural Wonders of the World series"--From the publisher's web site.
An introduction to state seals in the U.S. arranged by region, covering each seal's physical characteristics and year it was selected, and discussing its various parts and how to make a seal of one's own.
An introduction to the Great Lakes describing their location and the history of their formation, plant and animal life, discovery and early settlement, environmental issues, and more.