Lars Kenseth

“The fact that it took so many attempts to achieve success is not unusual with cloning, and that raises ethical questions about cloning extinct animals. Because of complications in development, lots of embryos are sacrificed in the cloning process. Many that grow into fetuses die soon after birth. Congenital diseases are common in clones, so they may suffer fatal complications before they leave the lab. Nobody knows how many lives or potential lives will be lost in the attempt to clone extinct species until these techniques are perfected for it. Pushing ahead with de-extinction by cloning inherently means taking risks.”
― Britt Wray, Rise of the Necrofauna: A Provocative Look at the Science, Ethics, and Risks of De-Extinction

“There are all sorts of hormones from the mother that can affect the fetus when life starts to sprout.”
― Britt Wray, Rise of the Necrofauna: A Provocative Look at the Science, Ethics, and Risks of De-Extinction

“For example, virus-resistant genes could be inserted in the genome of a species that is dying from an infection, or genetic susceptibility to a disease could be altered with precision gene editing,”
― Britt Wray, Rise of the Necrofauna: A Provocative Look at the Science, Ethics, and Risks of De-Extinction

“it took more than two hundred implantation attempts in fifty-seven goats for seven of them to get pregnant. Out of those seven pregnancies, only one was brought to term, and on July 30, 2003, Celia’s clone—the world’s first unextinct animal—was born, weighing in at 4.5 pounds. Roughly ten minutes later, though, she died; an extra growth on her lung prevented her from flourishing, and the bucardo became extinct a second time around.”
― Britt Wray, Rise of the Necrofauna: A Provocative Look at the Science, Ethics, and Risks of De-Extinction