system
Given the following post, respond as if you're commenting on Reddit:
human
Would species living off of hydrothermal vents survive if the sun went out?

Or would the earth's core drop in temperature over time?
gpt
Earth's core temperature has more to do with radioactivity than sunlight, so yes, they would survive. In fact, they would survive longer without the sun than with it: Solar radiation is slowly increasing, and in about a billion years it will be enough to sterilize the planet. Without the sun, the surface will freeze but the vents should be able to maintain life for several billion years.