Credit: The Smithsonian's National Museum of Natural History will make the Lion of Merelani, which is one of the most finely detailed colored gemstones worldwide, public Thursday.

Rare gem: Smithsonian Natural History Museum unveils dazzling green ‘Lion of Merelani’

Canisters in Fort Totten were WWI munitions, similar to chemical weapons in Spring Valley cleanup

DC attorney general pens support of proposal to ban employee noncompete clauses

Attorneys ask NFL for whistleblower protection against potential Dan Snyder lawsuits

Celebrate 25 years of ‘The Big Lebowski’ with ‘The Lebowski Experience’ at Pearl Street Warehouse

Alice Rivlin’s Forest Hills home on market for $6.7M