A New Hope for Male Fertility After Cancer Treatment
An experimental procedure that regenerates sperm could ensure that men are able to have kids following chemotherapy.
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L. SOUCI / BSIP / Getty What Is It Like to Regain a Sense of Touch, Only to Lose It Again?
A mind-controlled robotic arm might one day feel real, but for its first two paralyzed users, the sensation is only fleeting.
Susan Walsh / AP
