Model: 201903
Coral reefs are one of the world’s most important ecosystems, sheltering and sustaining about a quarter of all ocean species.The reefs are formed over thousands of years, mainly by colonies of animals called polyps. These creatures make stony corals, the foundation for most coral reefs, by..
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Model: 120904
A Pennsylvania barn is a barn design popular in the United States from around 1790 to 1900. It can be easily distinguished from other barn types by a prominent forebay. A forebay is a place on the barn where one or more walls overshoot the foundation. Most Pennsylvania barns have g..
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Model: 122504
“Let’s go sailing!” The U.S. Postal Service celebrates a favorite outdoor activity with two colorful postcard stamps. Illustrator Libby VanderPloeg grew up in Grand Haven, MI, a little harbor town on Lake Michigan, so sailboats were always dotting her views as a kid. With these memories in mind, she..
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