DLR, Scienza, Spazio Mars – Triple crater in the land of the Sirens 6 April 2017 fborgosano Leave a comment Share: The latest images from the HRSC camera show a triple crater formed by asteroid impacts in the Terra Sirenum region on Mars. On the crater floor are layered deposits that indicate the long-term existence of a lake. from DLR Portal – News Archive bit.ly/2nfzsiH Share: