What a coincidence! Three days into National Chemistry Week, we dive further into STEM education to celebrate Mole Day. We’re not toasting the burrowing animal, but the unit of measurement (mole) used primarily in chemistry and molecular science studies. We don’t know how many moles of liquid nitrogen are in this photo, but we do like the dynamic look of the super-cooled element, which in liquid form can resemble boiling water. We hope this photo doesn’t depict liquid nitrogen after somebody in the lab dropped their keys into the vat. At minus 320 degrees Fahrenheit, liquid nitrogen tends to flash-freeze anything immersed in it.
Of moles and liquid nitrogen
Today in History
More Desktop Wallpapers:
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From garden to table?
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Paleontology meets art
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Paris is photo-ready this week
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Float on
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National Hug Day
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Brotherly cubs
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Protecting endangered giants
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Digging the birds
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3,000 years of history
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Arbor Day
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Twas a night just like tonight
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A medieval Moorish gem
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Pont dArcole over the Seine river, Paris, France
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The Big Blue of the Sierra
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Bridge of Sighs in Venice, Italy
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San Francisco Bay salt flats
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Smithsonian Secretary Lonnie Bunch on the institution s 175th anniversary
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Islands of the Salish Sea
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Great Sand Dunes National Park and Preserve
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It’s National Walk to Work Day
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World Population Day
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It s Star Wars Day
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Manatee Awareness Month
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Splügen Pass, Switzerland
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National Park Week continues
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Papa was a flightless bird
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Bringing together history and technology
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Pearl of the Adriatic
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Aqueduct, Arkadia Park, Poland
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The Sonoran Desert, Arizona