The Delaware Museum of Nature & Science (DMNS) is a museum located since January 1, 2022. The museum was founded in 1957 by John Eleuthere du Pont near Greenville, Delaware; it opened in 1972 on a site near Winterthur, Delaware. It is known for its extensive collections of seashells, birds, and bird eggs. The latter is the second largest collection in North America. It is the oldest natural history museum in Delaware.