NASA's InSight detects two sizable quakes on Mars

NASA's InSight lander has detected two strong, clear quakes originating in a location of Mars called Cerberus Fossae--the same place where two strong quakes were seen earlier in the mission. The new quakes have magnitudes of 3.3 and 3.1; the previous quakes were magnitude 3.6 and 3.5. InSight has recorded over 500 quakes to date, but because of their clear signals, these are four of the best quake records for probing the interior of the planet.