I have only one quibble with such type of books. They should be sold in the fiction part of the bookshops and non as nonfiction.

A flight of fancy undisturbed by too much knowledge. The average science fiction author tries to be more coherent. The guy is either completely crank or, more likely, out for money without himself believing what he writes.

There are enough real dangers that could end mankind as we know it, so we are in no need of balderdash.

Wolfgang