Science

The Marian Koshland Science Museum Learn the science behind the news at rotating exhibits; discover how DNA is helping to solve crimes at the genetics exhibit, meet Bessy the Cow and learn how the methane she emits contributes to global warming. Corner of 6th & E St., NW, Washington, D.C.; +1 888 567 4526. Fee.

National Museum of Natural History Cower beneath the 87-foot Diplodocus that reigns supreme over Dinosaur Hall, learn how yams are prepared in Ghana at the African Voices gallery, learn what makes a mammal a mammal at the Hall of Mammals, watch a tarantula feeding at the Orkin Insect Zoo; in the winter, go ice skating at the rink in the sculpture garden between the Natural History museum and the National Gallery of Art. Constitution Ave. & 10th St., NW, Washington, D.C.; +1 202 633 1000.