Bok
09-26-2016, 08:46 PM
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.
More... (http://www.nasa.gov/image-feature/tectonically-active-planet-mercury)
More... (http://www.nasa.gov/image-feature/tectonically-active-planet-mercury)