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The Chinese scientist defends the genes for the arrangement of babies while the trial is put on hold



Conference moderator Robin Lowell-Bagge said the trial was a "step backward" for the scientific industry, but nevertheless described the birth of babies as "significant".

"This is an example of an approach that was not cautious enough and cautious and proportionate," he said.

"It's clear that … it's an important point in history."

Summit president David Baltimore, the Nobel Prize winner, said there was "a failure of self-regulation by the scientific community."

Antonio Regalado, senior biomedical editor for MIT Technology Review – the publication that first unveiled the trial on Sunday – said the conversation was "ethical half-baked chaos."

He, who was educated at Stanford University, said the twins' DNA was modified using CRISPR, a technique that allows scientists to remove and replace hair with precise accuracy.

But the co-inventor of CRISPR condemned the trial of Xe as dangerous and unnecessary.

"My concern is that this experiment really should not have happened," Feng Zhang told reporters at the conference. "What he did was not transparent … does not represent science".


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