Mars' gravity
... that Mars' gravity is affected by many negative free air gravity anomalies on its surface?
... that <b id="mwAbs"><a href="./Gravity_of_Mars" id="mwAbw" rel="mw:WikiLink" title="Gravity of Mars">Mars' gravity</a></b> is affected by many negative <a href="./Free-air_gravity_anomaly" id="mwAb0" rel="mw:WikiLink" title="Free-air gravity anomaly">free air gravity anomalies</a> on its surface?