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The contest part of the Great American History Puzzle is officially over! I think the ninth puzzle was a lot of fun, however, so I hope you take a shot at it even if there's no grand prize on the table anymore.
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George and Mr. Spacely sneak off to watch the big game, but are caught in the act by Jane on the family's super-sized television
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The ABO blood group evolved at least 20 million years ago, but scientists still don't understand the purpose of blood types
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The war on cancer has been going on for more than 40 years. Here are 10 small--and maybe not so small--victories scientists have had this year
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This week, visit with a Navy photographer, test your knowledge of the Wild West and catch a New York Times Best of 2011 film
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For over a century and a half, paleontologists have been confounded by the sail-backed carnivore Becklespinax. What did this dinosaur really look like?
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It's been a long hunt through some of the darkest corners of the Smithsonian vaults, but the light at the end of the tunnel is at hand
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Volcanic landscapes draw countless tourists to rumbling mountains, rivers of lava and boiling geysers. Here are a few of the hottest destinations
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With their divided toes and extreme length, these red knit wonders from an excavated Egyptian site have an otherworldly quality
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Earlier this week, federal officials arrested a man charged with selling numerous illegal dinosaur specimens
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Dr. Michelle Selvans will present new findings from MESSENGER's orbital imaging on October 20
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Mark Perez and his troupe of performers tour the country, using a life-sized version of the popular game to explain simple machines
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A 5-year old Samuel J. Seymour saw Lincoln's assassination, lived to talk about it on a 1956 game show
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Debris shed by the legendary Halley's comet could make for an impressive meteor show
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In Building Stories, cartoonist Chris Ware presents the banality of everyday life as a stunning comic epic
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The cure for lonely space missions? One astronomer proposed hiring astronaut concubines
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Prions - the infectious proteins that cause illnesses in humans and other animals such as mad cow disease - can pass through the digestive systems of crows
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Blanchard was said to be afraid of riding in a carriage, but she became one of the great promoters of human flight
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Sediments and ancient leaves recovered from the bottom of a Japanese lake will help scientists around the world more precisely date ancient objects
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