Large-screen IMAX theaters have been proliferating, so they are not quite as unique as they once were. But if you want to see an Omnimax film in a domed theater, the only place in New England that fits the bill is the Mugar Omni Theater at the Museum of Science. And get this: Throughout the month of March, admission on Fridays is free. Nada. Zip. The Omni experience is spectacular. Audience members sit in chairs that recline to nearly prone positions and watch films projected onto an enormous curved screen that almost fills their entire fields of vision.
The you-are-there immediacy is enhanced by a killer sound system that reverberates throughout the theater and permeates filmgoers' rib cages. The films, which all have an edutainment bent, include Africa: The Serengeti and The Last Reef: Cities Beneath the Sea. (Those edutainmenty films: They sure like using colons in the titles, no?) To take advantage of the Free Film Fridays offer, show up at the museum's box office and say the special phrase, "Hello Eddie!" No, just kidding. There's no special phrase. Simply pick up the tickets -- first come, first served -- on the day of the show.

Photo: A scene from Africa: The Serengeti. Museum of Science.