The concept of "Infinite Earths" refers to the idea that there are countless parallel universes or alternate realities existing simultaneously. Each Earth can have different versions of characters, events, and histories, allowing for diverse storytelling possibilities. This concept is often explored in comic books, particularly in the DC Comics universe, where characters like Superman and Batman can exist in multiple forms across different Earths. In these alternate realities, the same characters may have different powers, personalities, or even align with different moral choices. The "Crisis on Infinite Earths" storyline is a notable example, where various Earths and their heroes come together, highlighting the complexity and richness of the multiverse. This framework allows for creative exploration of "what if" scenarios in storytelling.