95 percent of ancient Ohio was forested. But centuries ago there were also small regions of prairie. Tall grasses and wildflowers were part of the prairie ecology and so were bison. Researchers near Columbus are trying to reestablish a prairie / bison ecosystem.
WOSU TV Archives
â€œGreat Cathedral Mysteryâ€ premieres tonight on NOVA. The great cathedral in Florence features the largest masonry dome on earth â€“ over forty stories tall! How they managed to build it 600 years ago is a mystery that has confounded historians and engineers. Tonight, NOVA tests the latest theories about its construction. Watch tonight or set [...]