As the age of the twin set increased, the effect of the hormone replacement therapy on age increased slightly. Also, larger differences of years of hormone therapy between the twins resulted in ...

The study relied on previous work showing that parents often emphasize differences between twins through what is termed the "contrast effect," a bias that exaggerates perceived differences.

On Monday the Minnesota Twins became Major League Baseball’s last team to unveil their City Connect uniform. The “Ripple Effect” was felt throughout Twins Territory, and while fans were ...