When I lie on San Francisco’s Ocean Beach and focus my vision softly on the undulating water, I imagine the life that swarms underneath the ocean’s surface. The fish, the sharks, even the tiny happy phytoplankton, all bumping and grinding amongst one another like puckish tipsy high-schoolers. I imagine this happens all over the ocean, a teeming sea of water and fish and water again.

Recently, concern about the long-term effects of head trauma related to contact sports has skyrocketed. At the center of the controversy are the rising number of former football players suffering from a neurodegenerative condition and the National Football League (NFL), which has largely denied any link between football and degenerative disease.

The recent outbreak of Zika virus in Central and South America correlates with a spike in birth defects, the first and foremost being microcephaly, a severe impairment of brain development. In Brazil, 1,113 cases of microcephaly have been confirmed, with 3,836 more suspected (as of April 12th, according to the Brazilian Health Ministry). The World Health Organization has declared this spike in microcephaly and other defects to be a global health emergency. The White House has asked Congress for $1.9 billion and has already transferred $510 million previously earmarked for an Ebola response.

From Brave New World to Gattaca, the repercussions of gaining genetic control over people’s traits has constantly preoccupied science fiction. The recent development of the CRISPR/Cas9 genome-editing technique is now making those concerns a preoccupation of science, no fiction necessary.