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The steamship Lexington burns and sinks four miles off the coast of Long Island with the loss of 139 lives.
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Antarctica discovered, Charles Wilkes expedition (US claim)
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Baltimore College of Dental Surgery, 1st in US, incorporated
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American Charles Wilkes discovers Shackleton Ice Shelf, Antarctica
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Draper takes 1st successful photo of the Moon (daguerrotype)
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1st adhesive postage stamps ("Penny Blacks" from England) issued
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Alexander Wolcott patents Photographic Process
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Organization of American Society of Dental Surgeons founded (NY)
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1st Hawaiian constitution proclaimed
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William H Harrison elected president of US