TrenchPress

“In the early period of human civilization, people lived and died by their ability to organize things spatially in their minds, tasks necessary when it came to constructing a shelter. We can thank our ancestors for that ability because nearly anyone can mow a lawn, though that deceptively simple task actually takes a lot of brainpower.

Then, with the advent of agriculture and cities, that ability became less necessary. Because humans were increasingly reliant on one another, natural selection made it less necessary for humans to weed out harmful mutations.”
Read more at http://www.medicaldaily.com/articles/13084/20121112/research-suggests-humans-becoming-more-stupid.htm

That explains a lot. But it has been said before…
16 Signs That People Are Becoming Stupider
http://trenchpress.com/?p=11578

“Groundbreaking new research has linked sodium fluoride to cardiovascular disease, the leading cause of death worldwide. Researchers found that fluoride consumption directly stimulates the hardening of your arteries, a condition known as atherosclerosis that is highly correlated with the #1 killer. Sodium fluoride is currently added to the water supply of many cities worldwide, despite extreme opposition from health professionals and previous studies linking it to decreased IQ and infertility.

In their research, scientists examined the relationship between fluoride intake and the hardening (calcification) of the arteries. Studying more than 60 patients, the researchers found a significant correlation between fluoride consumption and the calcification of your arteries. Published in the January edition of the journal Nuclear Medicine Communications, the research highlights the fact that mass fluoride exposure may be to blame for the cardiovascular disease epidemic that takes more lives each year than cancer. In 2008, cardiovascular killed 17 million people.”

“Government Admits Dangers Yet Continues to Pump Fluoride Into Your Water Supply”

Full article at: naturalsociety.com