They found that people who have been infected with the Toxoplasma gondii parasite are more likely to major in business and to have started their own businesses than non-infected people.

The parasite, which makes rodents unafraid of cats, may be reducing the fear of failure in people, Stefanie Johnson of the University of Colorado and colleagues said.

They haven’t actually shown that. But toxoplasma does get into the brain, and it’s been linked to a variety of mental effects in mice and people alike. And fear of failure could be a good thing, Johnson said.