An odd, previously unseen landform could provide a window into the geological history of Mars, according to new research by geologists. They call the structures periodic bedrock ridges. An odd, ...

Nuzzling up to the first outcrop of bedrock ever examined on Mars, NASA's rover Opportunity took more than 100 photographs over the weekend and gathered readings on the minerals in the rock, mission ...

Riverbeds often exhibit strange holes formed in bedrock. These “potholes” can resemble Native American grinding holes but, in some riverbeds, form in huge numbers without any evidence of human ...