The Fourth Copernican Revolution - Issue 64: The Unseen

The sun formed 4.5 billion years ago, but it's got around 6 billion years more before its fuel runs out. It will then flare up, engulfing the inner planets. And the expanding universe will continue--perhaps forever--destined to become ever colder, ever emptier. To quote Woody Allen, eternity is very long, especially toward the end. Any creatures witnessing the sun's demise won't be human--they'll be as different from us as we are from a bug.