 Although not as actively discussed as a potential home for microbial extraterrestrial life as Mars , Titan , Europa or Enceladus , there is evidence that Ceres ' icy mantle was once a watery subterranean ocean , and that has led to speculations that life could have existed there , and that hypothesized ejecta bearing microorganisms could have come from Ceres to Earth . 
 Although not as actively discussed as a potential home for microbial extraterrestrial life as Mars , Titan , Europa or Enceladus , <a href='dey_it' title='1'><mark>there</mark></a> is evidence that Ceres <a href='null_genetive' title='2'><mark>'</mark></a>icy mantle was once a watery subterranean ocean , and that <a href='been_done' title='3'><mark>has</mark></a> led to speculations <a href='null_relcl' title='4'><mark>that</mark></a>life could <a href='been_done' title='5'><mark>have</mark></a> existed there , and that hypothesized ejecta bearing microorganisms could <a href='been_done' title='6'><mark>have</mark></a> come from Ceres to Earth . 
Although not as actively discussed as a potential home fir microbial extraterrestrial life as Mars , Titan , Europa or Enceladus , it is evidence that Ceres  icy mantle was once a watery subterranean ocean , and that done led to speculations life could done existed there , and that hypothesized ejecta bearing microorganisms could done come from Ceres to Earth .