Mars: Chance of global extiction event mostly uncorrelated with Earth Antarctica: Chance of global extiction event almost literally 100% correlated with Earth

Mars: Chance of global extiction event mostly uncorrelated with Earth Antarctica: Chance of global extiction event almost literally 100% correlated with Earth Mars: Surface gravity 3.7 m/s², escape delta-v 5km/s Antarctica: Surface gravity 9.8 m/s², escape delta-v 11km/s > every metric you can think of I thought of two in under a minute with almost no effort.