We’re in no danger of a Crisis on Infinite Earths, but the discovery of an Earth-like planet just 13 light-years away from our home sparks theories about similar planets that might reside in our galaxy — or, for the deep thinkers, even in other dimensions.
Announced Wednesday by Harvard scientists, the new planet is about 76 trillion miles away, a distance that may seem impossibly far, but Harvard astronomer Courtney Dressing characterized the gap as just “a stroll in the park.”
Alternate or similar Earths are commonplace in science fiction, scratching the same itch as speculative fiction and alternate histories — for instance, the longstanding “Elseworld” and “What-If?” offshoots from DC and Marvel. Below are some standout examples of Earth’s similar — yet entirely different — from our own, but feel free to add your own favorites in the comments below!
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