If you've ever suspected that people are getting dumber by the day, new research has just proven humans really aren't as smart as they used to be. Studies show that the average IQ score has been falling with every generation born after 1975 — and now, scientists believe that at least one pesticide may be to blame for the sudden drop in intellect — if not more.

Countless studies have linked pesticide exposure to an array of health problems in humans, but scientists are now beginning to identify organophosphates, a class of pesticides, as a particularly malicious threat. Among the myriad of ill effects caused by exposure to organophosphates, evidence shows these compounds are fully capable of damaging children's brains.

And of course, these kinds of pesticides are used with abandon. Organophosphates are so dangerous that top researchers are now calling for a total ban on these toxins, due to their potential to harm children.