An unofficial ranking of the world's cleverest countries based on criteria including number of Nobel Prize nominations and ...

When IQ scores are plotted on a graph, they typically follow a bell-shaped curve, often called the bell curve. The peak of ...

Average IQ refers to the baseline score of the general ... but the fourth edition of the Wechsler Adult Intelligence Scale (WAIS-IV) is considered to be the gold standard in measuring intelligence ...

Across 14 countries where decades’ worth of average IQ scores of large swaths of the population were ... gained an average of 20 points on a test known as the Wechsler Intelligence Scale for Children ...

In ancient Rome, lead was widely used in glazed table wares, paints, cosmetics, and was intentionally ingested as well as being present in air pollution from mining and smelting.

Lead pollution in ancient Rome may have dropped the average IQ by up to three points ... 2,000 years ago were already having continental-scale impacts on human health," said the paper's co ...