The Dinosaur and Cavemen Expo promises to take visitors back in time � 65 million years back, to be precise.

Now in its fourth year, the event is sponsored by the National Science Foundation and hosted by the University of Missouri�s integrative anatomy and paleobiology groups. There will be dinosaur models, fossils, meteorites, asteroids and moon dust on display, and the NASA-produced film �Earth�s Wild Ride,� which offers a dynamic look at the planet�s natural history, will be shown in the Columbia Public School Planetarium every 45 minutes.

Raptor Rehab and the MU School of Natural Resources also will be there to introduce visitors to large birds of prey � modern relatives of dinosaurs.

The Dinosaur and Cavemen Expo will run 11:30 a.m. to 4:30 p.m. Saturday at Rock Bridge High School, 4303 S. Providence Road. Admission is free.