If you’re like 99% of humanity, you will know at least a couple of people you would describe as “toxic.” These kinds of individuals are pain to be around, but luckily you can in most cases get rid of them by just cutting them off. But in the future, you might want to seriously steer clear of them. That’s because if evolution plays out just right, they might become literally toxic. A new study, published in the journal Proceedings of the National Academy of Sciences, has found an interesting little tidbit about human genes. It turns out that we have potential to evolve into having venomous bites. Granted, the likelihood of this happening is unlikely, but who knows? Maybe some kind of global cataclysm will force us back into the wilds, and people with nastier bites start surviving better. “Essentially, we have all the building blocks in place. Now it’s up to evolution to take us there,” Agneesh Barua, a PhD student from the Okinawa Institute of Science and Technology and the study’s co-author, told LiveScience.