ON JANUARY 12, THE renowned journal Science retracted two articles written by South Korean scientist Woo-Suk Hwang, one published in February 2004 and a related piece--this one with an American "senior author"--published in May 2005. Both papers detailed an astonishing breakthrough in cloning…

SEVERAL CENTURIES AGO, some "very light-skinned" people were shipwrecked on a tropical island. After "many years under the tropical sun," this light-skinned population became "dark-skinned," says Biology: The Study of Life, a high-school textbook published in 1998 by Prentice Hall, an imprint of…