"It is universal across cultures for high dark triad scorers to be more active in short-term mating, " Schmitt says. "They are more likely to try and poach other people's partners for a brief affair."

While many cultures feel that the spider and web represent the weaving of life, in reference to Halloween, they represent dark, spooky places and haunted houses long forgotten.

Hydrogen production from starch by mixed cultures under light and dark conditions was studied in batch experiments.