Is it possible that underground there is a micro climate and we find organisms that we thought extinct such as

Question: Is it possible that underground there is a micro climate and we find organisms that we thought extinct such as dinosaurs and dodos? And would it be possible for humans to be there as well? And if so would they look/act differently than us.
- Keywords:
  dinosaur,
  dodo,
  human,
  microclimate,
  organism
Asked by Ana + Meg to Adam, Breandan, Gabriel, Sarah, Sophie, Walaa on 12 Mar 2018.
- Sophie Williams answered on 12 Mar 2018:
  
  I don’t think so, not on our planet as the only things that can survive under the earth are bacteria, beneath this you start to hit rock and then after that molten lava. Thats not to say there isn’t life on other planets in climates similar to ours! We just haven’t found them yet !

Question: Is it possible that underground there is a micro climate and we find organisms that we thought extinct such as dinosaurs and dodos? And would it be possible for humans to be there as well? And if so would they look/act differently than us.