Final answer:
Nicolaus Copernicus and Martin Luther both started a revolution by challenging established beliefs and bringing about significant changes in the way people think.
Step-by-step explanation:
Nicolaus Copernicus and Martin Luther have one thing in common - they both started a "revolution", a complete and dramatic change in the way people think about something. Copernicus introduced the heliocentric cosmology, which challenged the widely accepted geocentric model of the solar system. Luther initiated the Protestant Reformation, challenging the authority of the Catholic Church and advocating for reforms in religious practices and beliefs. Both individuals played significant roles in shaping the intellectual and religious landscape of their time.