Looks like
Green Guru James Lovelock is an ancient alien based on your facts.
I have studied Lovelock's ideas and concluded that he was a very sincere man, and very serious. There are numerous others that appear to be this way. (Bill Nye would be one, clearly....)
I do not have that impression about James Hansen or Michael Mann, or Suzuki....
There, there is that distinctive definite Krugman-like smell.