Earth is a fantastic place to be right now, but that won't always be the case. If humanity doesn't manage to completely destroy the planet for ourselves before our sun begins to grow noticeably warmer, its intense heat will make our world uninhabitable on its own. Scientists have long theorized that when the sun grows hot enough to cause serious problems for Earth, some of the icy moons in our Solar System might warm up enough to support life. Unfortunately, new research is casting some serious doubt on that idea, and suggests that finding a new place to live after Earth might force us to venture much farther.
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