Ashley Ness' babies entered the world as quadruplets, but one of her babies never made it home from the hospital. Three years ...

Each year, twins from around the world converge on Twinsburg, Ohio in a boon for scientific researchers studying everything ...

When our identical twin boys were born, we deliberately treated them as individuals. Even their closest friends struggled to tell them apart despite our efforts to differentiate them. The twins ...

Nine-month-old identical twin sisters from St. George were featured in the bright lights of Times Square, their photo ...

New research from University of Virginia psychologists has found that "epigenetic clocks"—tools scientists use to estimate a ...