Fossil Rim hosts Twilight T.W.A.N.G. evening event E-T staff report Fossil Rim Wildlife Center is hosting Twilight T.W.A.N.G., a fun event where patrons can spend an evening exploring the nature of Texas. Throughout the event, group members will be competing against one another, testing their animal knowledge to become the team that takes home the prize (and bragging rights). The Twilight T.W.A.N.G. education program includes an adventure into the park, nature walk to test your senses, campfire/s’mores science, and plenty of surprises as the team's educator keeps the fun coming.