I’ve heard repeatedly that life in deep space is incredibly unrealistic, but I’ve had a (certainly scientifically stretched) idea for a race of ant-like creatures who live deep under the lunar surface in tunnels. They spend the vast majority of their time biologically ”shut off,” similarly to how tardigrades can survive in a vacuum, with some sort of natural ability to store radiated heat from the moon’s core for energy in the process. After a long “hibernation” (not sure how long would be necessary), having built up a supply of energy, the creature’s eggs will begin to hatch, and the new mother will “wake up,” nurturing its infant daughters to maturity. The adult offspring, their growth fueled by heat collected by their egg over time, will soon leave their mother, burrow their own nest, and lay their own eggs. Then the expecting mothers will shut off until their eggs hatch, and the older mother, having spent her last reserves of accumulated energy from the lunar core raising her offspring, will die in her nest, possibly to be cannibalized by other creatures if they find her in the future.
TLDR: Underground space bugs collect heat from the lunar core over a long period of time while in their eggs, then use the store of energy to mature and lay more eggs before death, making respiration and a digestive system unnecessary.
Is this a somewhat feasible concept? Without knowing the intricacies of their biology, is there a way to estimate how much time would they need to hibernate to get 10-15 years of rapid growth, burrowing through the lunar mantle, and laying eggs? Are there any known processes to collect heat in this way without access to a light source (maybe they could live on the lunar surface instead if not)? If this process wouldn’t work on the moon, would it inside any other planet/moon? I would appreciate any input on this. I’m not sure if this question was specific enough; if not, I can try to close/remove it.
Thanks, anyone who read that really long question! :)