Three Smithsonian museums reopened in Washington, D.C. Friday: The Museum of African American History and Culture, the American Art Museum, and the National Portrait Gallery. The first lady said it was “culture and beauty coming back to D.C.” | Cleveland 19 News

Months? Try 179 years. The Smithsonian was officially created on this day in 1846. One of the first things on the to-do list? Construct a building! The 1850 glass lantern slide at the end of this video is the earliest-known photo of our Smithsonian Institution Building, known as the Castle, and the only image we have of it under construction. 📷: Smithsonian Libraries and Archives | Smithsonian

From history to mystery and everything in between, we've got your holiday viewing covered. Stream thousands of hours of your favorite Smithsonian Channel programs in glorious 4K UHD, commercial-free, all for just $4.99 per month. Get the new Smithsonian Channel Plus app today and start exploring. http://bit.ly/2EFSjvP | Smithsonian Channel

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They can grow as long as 10 feet, but all the sand striker’s victims will ever see of it are spiny jaws lurking just above the ocean floor. See more underground excitement on the new Crazy Monster: Diggers - coming Wednesday at 8PM. http://bitly.com/MonsterDiggers | Smithsonian Channel