system
Given the following post, respond as if you're commenting on Reddit:
human
Is there anything alive in the soil 100 feet below ground level?

Let's say you're drilling around 100' deep. Is there going to be any bacteria in the dirt/clay thats brought up? Is it completely sterile?
gpt
Bacteria have been found *kilometers* below the surface. And that is not a limit of life - it is a limit of how deep we searched systematically. Some of them live from radioactive decays, as long as there is liquid water once in a while and the temperature range is fine they can survive, no contact to the surface necessary.