How long could humans survive without the Sun? Most people on the surface would likely last weeks to months, as temperatures fall below freezing within a week and crops stop growing. Underground groups might last longer, but it is untested.…

Take a moment and look around. The chair beneath you. The floor under your feet. The air filling your lungs. Every ocean, mountain, forest, and city on Earth exists exactly where it is because of one invisible force. Gravity. You…