Intelligence Facts

Poor eyesight (myopia) is associated with higher IQ.

Studies have found that hair samples from people with higher IQ scores tend to contain greater concentrations of zinc and copper.

The average IQ is designed to be exactly 100, with scores above 130 considered gifted and above 145 typically classified as genius-level.

Sheep can recognize other sheep from pictures!

Neanderthals had an average brain size up to 100cc larger than modern humans, yet this didn't translate to greater intelligence.

Research shows that verbal intelligence is positively correlated with worry and rumination. Brain scans reveal that both high intelligence and excessive worrying share similar patterns of neural activity in the brain's white matter.

In the US, a court ruled that police departments can legally reject applicants for scoring too high on intelligence tests, after a man was denied a job for being 'too smart.'

A 1996 study suggested a link between body hair in men and higher intelligence, though the findings remain disputed and the correlation was modest.

People who are more likeable and attractive are generally perceived as more intelligent. This is called the “Halo Effect.”