In the second half of 2024, a growing group of scientists gathered reports and wrote a policy platform for Science. Relman briefed policymakers at the White House, members of the defense community, and the National Security Agency. The researchers met with the National Institutes of Health and the National Science Foundation. “We briefed the United Nations, the UK government, the Singapore government, Brazilian scientific funding organizations,” says Glass. “We have indirectly talked to the Chinese government. We were trying not to ignore anyone.”
After one and a half years, this pressure has had its effect. UNESCO has recommended a precautionary global moratorium on the creation of mirror-life cells, and major philanthropic organizations funding science, including the Alfred P. Sloan Foundation, have announced that they will not fund research leading to mirror microorganisms. Bulletin of Nuclear Scientists Its most recent report on the Doomsday Clock highlighted ideas about mirror life. In March, the UN Secretary-General’s Scientific Advisory Board issued a brief highlighting the risks – for example, recent advances on the creation of mirror molecules could reduce the cost of creating mirror microbes.
“I think at this stage no one really believes that we should create mirror life based on the available evidence,” says James Smith, the scientist who leads the MBDF. The challenge for scientists now, says Smith, is to work with policymakers and bioethicists to figure out how much research on mirror life should be allowed — and who will enforce the rules.
line haul
Not everyone agrees that mirrors pose an existential threat to creatures. Without conducting experiments on them, it is difficult to verify predictions about how the immune system or mirror microbes will perform in the larger world. Some scientists have rejected doomsday scenarios, suggesting that the mirror presents an “increased view of the threat” of the case against life. Others have noted that carbohydrates called glycans already exist in both left-handed and right-handed forms – even in pathogens – and the immune system can recognize them both. He says experiments focused on the interactions between the immune system and mirror molecules could help clarify the risks of mirror organisms and reduce uncertainty.
Even among those who believe that worst-case scenarios are possible, researchers still disagree on where to draw the line. What interrogations should be allowed and what should be prohibited?
Andy Ellington, a biotechnologist and synthetic biologist at the University of Texas at Austin, doesn’t think mirror organisms will come to fruition any time soon. Even if they do, they’re not sure they’ll pose a threat. “If the human race is going to suffer, it’s number 382 on my list,” he says. But at the same time, he says it’s a complex issue worthy of more study, and he wants the conversation to continue: “We’re working in a space where so much is unknown that it’s very difficult for us to do a risk assessment.”
Even among those who believe that worst-case scenarios are possible, researchers still disagree on where to draw the line. What interrogations should be allowed and what should be prohibited?
Adamala and others at the University of Minnesota see a natural line in ribosomes, the cellular factories that convert chains of amino acids into proteins. These will be a key component in creating self-replicating organisms, and Adamala says the path to getting there will be pretty straightforward once the mirror ribosomes are established. But Zhu and others at Westlake believe it is worthwhile to develop mirror ribosomes because they could potentially produce therapeutically useful peptides and proteins more efficiently than traditional chemical methods. He sees a clear distinction, and a fundamental difference, between that type of technology and the creation of a living synthetic organism. “It is important to distinguish mirror-image molecular biology from mirror-image life,” he says, adding that many synthetic molecules and organisms that contain unnatural components, including but not limited to mirror-image subsets, may pose health risks. He says researchers should focus on developing overall guidelines to cover such risks — not just mirror molecules.
Even though the exact risks remain uncertain, Esvelt is more convinced than ever that work should be stopped, perhaps indefinitely. He says that no one has taken any meaningful action on the hypothesis that life like a mirror can erase everything. He points out that the primary uncertainties are not about whether mirror life is dangerous; They have more work to do to identify which bacteria – including which genes it encodes, what it eats, how it evades the immune system’s sentinels – can cause the most serious consequences. He says, “The risk of losing everything, like the entire future of a unified humanity over time, is not worth any small part of the economy. You don’t mess with that kind of existential risk.”
