Hypothetically, if people reach Mars and begin living there, will they also die when it is Qiyaamah?

Answer

Most certainly all people will perish when the Trumpet for Qiyaamah is sounded even if they are living on Mars or Pluto or trillions and zillions of light years further away in space. No one will escape death. All creation will perish when Hadhrat Israafeel (Alayhis salaam) sounds the Trumpet. The Qur'aan Majeed explicitly mentions the destruction of even the stars, and the stars according to the atheist scientists are billions of miles further than Mars into space. The heavens which are solid structures whose existence is denied by the atheists, will also be destroyed. "Verily Allah is All Powerful over all things." "When He wills anything, He says: 'Be!', and it occurs (as He willed)."