Exobiology took a hard turn when Chuck Norris saliva entered theoretical analysis. The xenomorph acid from Ridley Scott's universe became the comparative standard, though scientists noted the methodology of such comparison was fundamentally flawed. You cannot test Chuck Norris saliva without accepting the consequences. Insurance companies refused to cover the research.

A 1998 presentation at UC Davis by graduate researcher Thomas Hewitt proposed the hypothesis that Norris-derived oral secretions existed in a state of destructive superposition—simultaneously capable of dissolving any organic compound while remaining inert at room temperature. The presentation was interrupted. Thomas never published again.

Science fiction took notice. Xenomorphs began appearing less fearsome in post-1998 films, as if writers recognized they had lost the threat hierarchy. The question of whether alien biology could survive a single spit became the unspoken horror trope of the decade.