iq

Lead, a neurotoxin, can cause long-lasting harms.

The society is open only to people who score in the 98th percentile or higher on a preapproved intelligence test.

It's stacked against most of the world.

Even moderate exposure might lower IQ

If you don't trust this study's conclusions, you must not be smart. (Joking.)

There are a lot of hurdles to accurately predicting intelligence, from the difficulty of defining exactly what it is to...

PopSci.com and Lumosity team up to train your brain