Now times had changed, and the inherited wisdom of the past had become folly. - Arthur C. Clarke

Kolya believed that the Mongols’ expansion was pathological. It was a ghastly spiral of positive feedback, born of Genghis Khan’s unquestioned military genius and fueled by easy conquests, a plague of insanity and destruction that had spread across most of the known world.

So many people did it that it was no longer an obsession; it was a demographic.

The search for alien artefacts in the Solar System should be a perfectly legitimate branch of science ('exoarchaeology'?). Unfortunately, it has been largely discredited by claims that such evidence has already been found - and has been deliberately suppressed by NASA! p. 97, Acknowledgements