The bizarre Martian rocks just keep on comin'. NASA's Perseverance Rover has stumbled across an extremely strange rock that's "astonished" scientists while exploring the rim of the Jezero crater on Mars. Nicknamed "St Pauls Bay," the rock is made up of hundreds of densely packed, millimeter-sized dark spheres — like an insect's slimy egg cluster.  These "spherules," as they're known, are heterogeneous. As seen in a closeup taken with Perseverance's SuperCam Remote Micro Imager, some of them appear more elliptical while others are more angular. Stranger still, some spherules have tiny pinholes through their centers.  In short, it's nothing like […]