Today's Image of Mars shows lobate flow features in the Northwest Hellas Rim. Lobate features on Mars are generally located at mid-latitudes (30-60 degreees) and are indicative of viscous flow reminiscent of glaciers on Earth. These slow flowing features has long been thought to be evidence of subsurface ice on Mars. This assertion is supported by recent ground penetrating radar images, which indicate these lobate features have cores of ice.
Clicking this image will take you to the original captioned image by HiRISE.