Friday, 3 July 2015
Michael Moorcock's, disrupted by the Conjunction of the Million Spheres and adapted for comic books;
DC Comics', ended by the Crisis on Infinite Earths but restored with 52 universes in a later Crisis;
Arnold Schwarzenegger's in The Last Action Hero, doing for feature films what DC Comics does for comics;
Poul Anderson's several universes linked to the Old Phoenix Inn;
SM Stirling's several alternative universes, of which I have so far read three -
Alexander the Great survived into old age and a Gate opened from an Earth almost indistinguishable from ours (one novel);
in 1878, cometary fragments devastated Earth and a psychic senses alternative Earths (one story and one novel);
powerful aliens had terraformed Venus and Mars and later opened Gates to other places (one story and two novels).
Stirling also has two (?) multi-volume alternative history series that I have not tackled yet.