Subsurface map of moon reveals impact craters' origin
Using a subsurface map of the moon, scientists have offered an explanation for the formation of 'Mare Orientale', a 930 km-wide bull's-eye-shaped impact feature. Their theory states that the crater caused by smaller original impactor, collapsed inward to form 'Mare Orientale' 3.8 billion years ago. The findings could help understand how similar impacts influenced the early evolution of Earth.