IQ scores have been steadily falling for the last few decades, and environmental factors are to blame, a new study says.
원문출처 : https://www.cnn.com/2018/06/13/health/falling-iq-scores-study-intl/index.html
원문출처 : https://www.cnn.com/2018/06/13/health/falling-iq-scores-study-intl/index.html