The Expo will showcase more than 100 exhibits featuring live amphibians and reptiles, such as turtles, frogs, lizards, salamanders, and numerous species of snakes; fossil and mineral displays; colorful insects such as beetles and butterflies; and such live mammals as ferrets. Biological exhibits and presentations will show actual human organs, including normal and abnormal brains, human hearts, various cardiovascular materials, lungs, gastrointestinal tracts, normal and abnormal kidneys, and normal and abnormal human skeletons. Formal presentations will focus on vertebrate evolution, ecology, anatomy, physiology, ethology and pathology.

The science extravaganza offers hands-on activities designed to educate and entertain adults and children of all ages. Make "slime" in the Chemistry laboratory; touch crystals, rocks and minerals in the Earth and Environmental Science Center; and get tips on the importance of healthy eating. Attendees will see powerful electron microscopes and learn how X-rays work. And for dinosaur enthusiasts, there will be illustrated lectures on aspects of dinosaur evolution, as well as carnivore evolution, amphibian ecology and forensic pathology.

"This event has become an important part of science education and interest on Long Island," said Jeffrey A. Zeisler, Science Expo Committee chairman. "The hands-on exhibits and in-depth presentations that characterize this Expo are both educational and enjoyable. There truly is something of interest for everyone."

Several special presentations will highlight the day's events:

• Professor Donald Phillips, president of the New York Paleontological Society, will present an illustrated slide show and lecture on the evolution of dinosaurs and birds, titled "From Dinosaur to Birds and the Evolution of Flight." He will also present an exhibit on evolution in the Long Island area and show actual fossils.
• Donald R. Ferruzzi, professor of biology and chairman of the Department of Natural Sciences at the Western Campus of Suffolk County Community College, will present an illustrated lecture on forensic medicine, titled "The Medical Autopsy: Merging Science and the Law."
• Dr. Grace Rossi, C.W. Post Psychology professor and neuroscientist, will present a lecture on brain structure and function in humans and other animals.
• Theodore Roosevelt Sanctuary staff will speak about raptor biology using live birds of prey.

The C.W. Post Campus is located at 720 Northern Boulevard (Route 25A) in Brookville. For additional information, call the College of Liberal Arts and Sciences at (516) 299-2233, the C.W. Post Biology Department at (516) 299-2481 or visit www.cwpost.liu.edu/cwis/cwp/clas/expo.htm