A rock containing many smaller round stones could indicate that there was once a large amount of liquid water on the Red Planet.

NASA’s Perseverance Rover Stumbles on Unusual Rock That Looks Like a Skull on Mars, Stun Scientists Mars exploration has grown exponentially over the past few years. Recently, NASA made a discovery on the Red Planet,

NASA's Perseverance rover on Mars has discovered unusual "float" rocks on the rim of Jezero Crater while searching for signs of ancient microbial life. Scientists are investigating their origin.