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How much is the Hope Diamond worth? Ask Smithsonian.

Our inquisitive readers are rising to the challenge we gave them last month. The questions are pouring in and we’re ready for more. Do you have any questions for our curators? Submit your questions here.

How much is the Hope Diamond worth? — Marjorie Mathews, Silver Spring, Maryland

That’s the most popular question we get, but we don’t really satisfy people by giving them a number. There are a number of answers, but the best one is that we honestly don’t know. It’s a little bit like Liz Taylor’s jewels being sold in December—all kinds of people guessed at what they would sell for, but everybody I know was way off. Only when those pieces were opened up to bidding at a public auction could you find out what their values were. When they were sold, then at least for that day and that night you could say, well, they were worth that much. The Hope Diamond is kind of the same way, but more so. There’s simply nothing else like it. So how do you put a value on the history, on the fact it’s been here on display for over 50 years and a few hundred million people have seen it, and on that fact it’s a rare blue diamond on top of everything else? You don’t. – Jeffrey E. Post, mineralogist, National Museum of Natural History

What’s the worst impact of ocean acidification so far?- Nancy Schaefer, Virginia Beach, Virginia

The impacts of ocean acidification are really just starting to be felt, but two big reports that came out in 2011 show that it could have very serious effects on coral reefs. These studies did not measure the warming effect of carbon dioxide in the atmosphere, but rather its effect of making the ocean more acidic when it dissolves in the ocean. Places where large amounts of carbon dioxide seep into the water from the sea floor provide a natural experiment and show us how ocean waters might look, say, 50 or 100 years from now. Both studies showed branching, lacy, delicate coral forms are likely to disappear, and with them that kind of three-dimensional complexity so many species depend on. Also, other species that build a stony skeleton or shell, such as oysters or mussels, are likely to be affected. This happens because acidification makes carbonate ions, which these species need for their skeletons, less abundant.

Nancy Knowlton, marine biologist
National Museum of Natural History

Art and artifacts from ancient South Pacific and Pacific Northwest tribes have similarities in form and function. Is it possible that early Hawaiians caught part of the Kuroshio Current of the North Pacific Gyre to end up along the northwest coast of America from northern California to Alaska? — April Croan, Maple Valley, Washington

Those similarities have given rise to various theories, including trans-Pacific navigation, independent drifts of floating artifacts, inadvertent crossings by ships that have lost their rudders or rigging, or whales harpooned in one area that died or were captured in a distant place. Some connections are well-known, like feather garment fragments found in an archaeological site in Southeast Alaska that appear to have been brought there by whaling ships that had stopped in the Hawaiian Islands, a regular route for 19th-century whalers. Before the period of European contact, the greatest similarities are with the southwest Pacific, not Hawaii. The Kushiro current would have facilitated Asian coastal contacts with northwestern North America, but would not have helped Hawaiians. The problem of identification is one of context, form and dating. Most of the reported similarities are either out of their original context (which can’t be reconstructed), or their form is not specific enough to relate to another area’s style, or the date of creation cannot be established. To date there is no acceptable proof for South Pacific-Northwest Coast historical connections that predates the European whaling era, except for links that follow the coastal region of the North Pacific into Alaska.

William Fitzhugh, archeologist
Natural History Museum

Giants and patriots come in all forms, as seen in "Giant Demon Attacks a Ship," an Indian watercolor ca. 1775. Photo courtesy of the Freer and Sackler Galleries

Take a look at our photo gallery of giants and patriots in the Smithsonian Institution.

In honor of Super Bowl Sunday, we’ve come up with our own contest of “giants” and “patriots.” A disclaimer, though: it has nothing to do with football. We’ve combed through archives and collections across the Smithsonian Institution to come up with a unique set of patriots and giants for you to check out to get ready for the game.

If you’re a Giants fan, we’ve got everything from giant pandas to giant sequoias to “Elaganeek: the Eskimo Giant.” “Giant’s Thumb,” a 1926 woodcut by Howard Cook in the American Art Museum, depicts one of the artist’s favorite natural spots in New Mexico, his adopted home.

For New England fans, though, the Smithsonian is filled with patriots both real and invented. Uncle Sam, of course, is the country’s iconic patriot, but real-life figures like George Washington and Samuel Adams were the original embodiments of patriotism during the birth of the country. The concept of patriotism is so powerful that the U.S. military has named missiles after it.

“Giant Demon Attacks a Ship,” an Indian watercolor painted by a Jain artist sometime around 1775, is the one piece that Giants fans might interpret as a good omen for the game. In the painting, a large blue demon seems poised to destroy a British ship, filled with sailors dressed not so differently from the Patriots original mascot, Pat Patriot. Watch on Sunday to see how the real life matchups turns out.

Take a guided tour of the universe in the Air and Space Museum's portable planetarium. Image courtesy of Air and Space.

Friday, February 3 Under the Stars

Explore the night sky up close from the Air and Space Museum’s observatory with astronomers and astronomy educators who will guide you through the different planets and constellations of the winter sky. Then zoom out for a view of the universe in the museum’s inflatable planetarium. $25 general admission, $20 for members. 8:00 p.m. to 10:00 p.m. Air and Space Museum.

Saturday, February 4 Black History Month Family Day

Celebrate the start of Black History Month with performances including the blues stylings of “Guitar Man” Warner Williams and a puppet show, Can You Spell Harlem? Plus, learn the art of step in a workshop by the Taratibu Youth Association step performers. After the festivities end, head over to the McEvoy Auditorium for a screening of Chris Rock’s documentary, Good Hair. Free. 11:30 a.m. to 3:00 p.m. Film screening at 3:30 p.m. National Portrait Gallery and American Art Museum.

Sunday, February 5 The Big Sleep

Classic film noir The Big Sleep is breaking in the American History Museum’s brand new Warner Brothers Theater on Sunday. First, join NPR film commentator Murray Horwitz for a pre-screening discussion of historical tidbits and elements to pay attention to in the film. Afterward, let private eye Phillip Marlowe (Humphrey Bogart) lead you through a whirlwind of blackmail, murder and love in this 1946 masterpiece. Free. Pre-film talk at 1:00 p.m. Screening starts at 2:00 p.m. Warner Brothers Theater, American History Museum.

For a complete listing of Smithsonian events and exhibitions visit the goSmithsonian Visitors Guide. Additional reporting by Michelle Strange.

A still life from Annie Leibovitz's Pilgrimage, on view at the American Art Museum. Image courtesy of Annie Leibovitz/Contact Press Images.

Tuesday, January 24 Annie Leibovitz’s Pilgrimage

Renowned portrait photographer Annie Leibovitz comes to the American Art Museum to discuss her latest project, Pilgrimage, currently on view. Called an “icon-maker” by the New York Times, Leibovitz departs from her usual celebrity portraits to a deeply personal, largely unpeopled study of places and objects that have moved her over the years. Free. This event is sold out, but a stand-by line will be formed at 5:30 p.m. Talk starts at 7:00 p.m. McEvoy Auditorium, American Art Museum.

Wednesday, January 25 Profile America Forum on American Indian and Alaska Native Populations

At this forum, the U.S. Census Bureau will release a 2010 Census brief on the status of American Indian and Alaska Native populations across the country. Following the presentation, museum director Kevin Gover will moderate the discussion with an expert panel on the current social and economic impact of the American Indian and Alaska Native populations. Free. 1:00 to 4:00 p.m. Museum of the American Indian.

Thursday, January 26 Flights of Fancy

In the latest program of the Air and Space Museum’s Flights of Fancy story series, kids of all ages will learn about the historic 1969 flight of Apollo 11 in a story-telling of Moonshot: The Flight of Apollo 11 by Brian Floca. Free. 11 a.m., repeating Friday, Saturday and Sunday. Air and Space Museum.

For a complete listing of Smithsonian events and exhibitions visit the goSmithsonian Visitors Guide. Additional reporting by Michelle Strange.

Now that you’ve probably burned through the lists of historians, innovators, and food-writers to follow this year, we’re bringing it back home to the Smithsonian. As always, the Mall is cooking up some fascinating, crazy, and sometimes grotesque stuff for 2012. Bookmark these people and projects to keep up with this year:

Nicholas Pyenson: Pyenson studies and curates fossils of marine mammals. Get a feel for what is going on inside his lab and follow his team into the field—fresh from an expedition in Chile—at his blog, Pyenson Lab.

Postal Museum: Time for a pop quiz: A “hamper dumper” is:

a) machine in postal processing

b) bin of misprint stamps

c) failed mail vehicle

d) philatelic tool.

If you know the answer, you should be following the Postal Museum (@postalmuseum) for their daily #PostalQuiz and other philatelic factoids.

Biodiversity Heritage Library: As part of the Biodiversity Heritage Library consortium, the Smithsonian Libraries collects and digitizes biodiversity research for open online access—essentially, a bio-wiki. Check out @biodivlibrary for the species of the day: plants that eat worms, albino penguins and other bizarre creatures you never knew existed.

Archives of American Art Pinterest: The American Art Pinterest lets you browse the archives and “pin” the images you like to your virtual board. Mix and match from collections like “facial hair of note” and “ain’t no party like an artist’s party.”

Book Dragon: The Smithsonian Asian Pacific American Program’s Book Dragon is the pet project of former APA Media Arts Consultant Terry Hong, featuring reviews of “books for the multi-cultural reader.” Hong highlights literature for kids and adults alike that speaks to the Asian American experience. Follow her at @SIBookDragon.

Smithsonian Vids: For a moving view of the Institution, follow @SmithsonianVids. Meet a scientist studying frog-eating bats, or get a video tour of Smithsonian Folkways Recordings from Grateful Dead drummer Mickey Hart.

Smithsonian Marine Station: This Natural History Museum field station, located in Fort Pierce, Florida, tweets news updates and photos from the field (er, coral reef) @SmithsonianSMS. Plus, there’s #followfriday trivia every week.

Field Book Project: Also, from the Natural History Museum and the Smithsonian Institution Archives check out this blog, where researchers post updates on their initiative to compile an online database of field books and journals documenting biodiversity research. Besides progress updates, you’ll also find excerpts of century-old field notes from explorers, birdwatchers and scientists (including lots of fun, old-timey sketches) and learn a lot more than you ever thought there was to know about indices.

Encyclopedia of Life: Take your best shot and enter the picture in the Smithsonian’s Encyclopedia of Life Flickr photo contest. The bi-weekly contest could be (and has been) any theme from “backyard life” to “sexual dimorphism.” Even if you don’t enter, be sure to browse the entries for gems like this.

And of course, if you’re not following them already, the museums are always Tweeting up a storm. Here’s the checklist:

American Indian Museum: @SmithsonianNMAI

National Portrait Gallery: @npg

American Art Museum: @americanart

Anacostia Community Museum: @anacostiamuseum

American History Museum: @amhistorymuseum

Air and Space Museum: @airandspace

Museum of Natural History: @NMNH

Hirshhorn Museum and Sculpture Garden: @hirshhorn

Freer and Sackler Galleries: @FreerSackler

Museum of African Art: @NMAfA

National Zoo: @NationalZoo

Cooper-Hewitt National Design Museum: @cooperhewitt

Smithsonian: @Smithsonian