NASA Image of the Day: Tectonically Active Planet Mercury

Tectonically Active Planet Mercury New NASA-funded research suggests that Mercury is contracting even today, joining Earth as a tectonically active planet. Images obtained by NASA’s MESSENGER spacecraft reveal previously undetected small fault scarps— cliff-like landforms that resemble stair steps. September 26, 2016 from NASA http://ift.tt/2d3OfXI via IFTTT