"Human ingenuity has given centuries to the goal of ensuring that the human body might move around at an even 68 degrees all year."

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Eventually, the Sun will swell to occupy the entire sky as its expansion subsumes the orbit of earth. Earth's surface temperature will rise until it matches the 3,000-degree rarified outer layers of the expanded Sun.... But not to worry. We will surely go extinct for some other reason long before this scenario unfolds.

— Neil deGrasse Tyson