Photographer David Blackwell and his wife prepared for the apocalypse. Cats and cat food? Check. Toilet paper? Check. Exploding volcanoes and hurtling asteroids? Not so much. David Blackwell/Flickr hide caption

itoggle caption David Blackwell/Flickr

A replica Mayan Calendar Round showing the date September 21, 2004, opening day for the Smithsonian's National Museum of the American Indian. Molly Stephey/Smithsonian's National Museum of the American Indian hide caption

itoggle caption Molly Stephey/Smithsonian's National Museum of the American Indian

Great Basin's Mayan Maybe? beer has been a fast seller, the company's brewmaster says. Jazz Aldrich/Great Basin Brewing Company hide caption

itoggle caption Jazz Aldrich/Great Basin Brewing Company

When you reach the end of your journey, will you be able to look back on a life well lived? Raymond Roig/AFP/Getty Images hide caption

itoggle caption Raymond Roig/AFP/Getty Images