Assertion: axial tilt | /r/HasProperty | unstable
Facets:
value: very
type: DEGREE
Source sentences:
text: Mars is in the habitable zone in our solar system, but its axial tilt has been very unstable - varying from zero to 60 degrees," Gongjie Li, the lead author of the study, said in a (https://www.eurekalert.org/pub_releases/2018-06/giot-mct062818.php) statement .