NASA is an eyewitness to just how weird Mars can be as evidenced by a “mushroom” rock spotted by the Perseverance rover. A red circle shows the mushroom-shaped rock seen by NASA's Perseverance ...

It also suggests these bizarrely shaped "moonlets" may be more common ... rubble-pile "parent" asteroid — composed of loosely held rocks — spins so fast that it sheds some of its mass, which ...