'Sup nature boys and girls? Show off your nature brains during the Montana Natural History Center's Trivia Night. Come as a team or join up with others when you arrive. Compete in categories such as Fire and Weather, Invertebrates and Name that Bird Song. Test question: What bird is all, "Caw?" Montana Natural History Center, 120 Hickory St. 7 PM. $4 suggested donation/members free.