"Aliens: Theory of Propagation" by John Bolton
Dark Horse Comics cover art from Aliens: Theory of Propagation/The Alien published in 2013
(cover art previously used on Aliens, Vol. 2: Nightmare Asylum TPB published in 1996)
Humanity's encounters with the deadly extraterrestrial "bugs" have had distastrous, lethal results. But how did this species spread across the galaxy? Find out in "The Theory of Aliens Propagation," by Aliens: Outbreak writer Mark Verheiden (screenwriter of The Mask, TimeCop, Battlestar Galactica) and artist Mark A. Nelson. And in "The Alien," the xenomorph infestation that rendered Earth all but uninhabitable in Outbreak comes to a head as the exiled human population negotiates with the "Space Jockey" species intent on exterminating the infesting xenomorphs—and Earth!