Xenomorphs from the Alien franchise have staked their claim as some of the most terrifying extraterrestrials of all time. We fear them for their merciless hunting of people, their super acidic blood, and their (probably) awful tiny-second-mouth breath. But it's the xenomorph's reproductive cycle, which includes elements analogous to real-life parasitoidism, cancer, and good ol' fashion spermatophores, that really make them the last kind of creature you'd want to be stuck with aboard an M-Class star freighter. The cycle endures as one of the most fascinating fictional methods of producing offspring ever, so here's a brief breakdown of the steps...
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