For more than a century, scientists have debated whether intelligence is mostly a product of nature or nurture. Identical ...

Identical twins who were raised apart may have IQ differences similar to those of total strangers, according to new research.

When Rocco Baldelli made the pitch to his team last month, imploring them to be more aggressive on the base paths, the Twins’ manager admits he didn’t know what would come of it. Three weeks later, he ...

A new analysis of studies spanning the last century finds that differences in schooling appear to explain a large portion of ...

Identical twins Hugo and Ross Turner are set to climb Nepal's Mera Peak in October, one outfitted in a forensic replica of George Mallory's 1924 Everest expedition gear and the other in modern ...

A new study has found that while the twinning rate is expected to fall in India, the country will remain home to one of the ...