Technical and ethical barriers prevent human clones from being created 25 years after Dolly Schaf ksuadminJuly 5, 2021 8 The 25 years that have passed since the birth of Dolly the sheep, the first viable clone of a mammal, is an exemplary lesson in how technology development tends to follow nonlinear and unpredictable paths. The most obvious element of this unpredictability has to do with the total absence of human clones in the world in 2021, though the ethical debates that followed Dolly’s announcement of her existence have been obsessing about this for a number of years. At the beginning of this century, the birth of the first cloned baby sometimes seemed just a matter of time, and some personalities with questionable reputations soon announced it.