1. On December 4, 1906, the iconic Cleveland Museum of Art was founded. It is one of the most visited art museums in the world and boasts an impressive collection of over 61,000 works of art.

2. Ohio-born Wilbur Wright, one of the famous Wright Brothers, successfully flew a plane for the first time on December 4, 1903, near Kitty Hawk, North Carolina. The Wright Brothers' historic flight revolutionized the world of aviation and opened the door for modern air travel.

3. Ohio State University, located in Columbus, was founded on December 4, 1870. It is one of the largest universities in the country and is known for its excellent academic programs and successful athletic teams.

4. On December 4, 1955, Rosa Parks refused to give up her seat on a Montgomery, Alabama bus, sparking the Civil Rights Movement. Though not an Ohio-specific event, her bravery and activism inspired many Ohioans to become involved in the fight for racial equality.

5. On December 4, 1979, Pioneer 11 became the first spacecraft to visit the solar system's outermost planet, Saturn. The probe was launched by NASA from Cape Canaveral and made important scientific discoveries about Saturn's atmosphere and moons. Ohio played a crucial role in the space program with many facilities and engineers located in the state.