Stop describing a planet as 'Earth-like' unless it really is(yahoo.com)

  Not the Earth 2.0

  In any case, and although it is an excellent candidate
  planet that could harbor life, Proxima b cannot be
  considered an Earth twin. One thing is certain, in fact:
  the history of Proxima b and its star was radically
  different from the history of the Earth and the Sun. The
  formation of Proxima b, the irradiation by its star, the
  tidal forces it suffers affecting its internal structure
  and rotation, its possible climates have no equivalent in
  the history of our planet.