Planetary Science

My interest in planetary science is simple – I want to know why Earth is so strange. Examples of the questions which drive me are shown below:

  1. Why does Earth have plate tectonics?
  2. What role has plate-tectonics played in manipulating the chemistry of Earth’s surface environment?
  3. How has Earth sustained life for so long?
  4. Why is Venus so similar in mass and composition (the most Earth-like planet ever observed), but so very different in term of geodynamics ?