AI Summary
5 min readIn 2024, a group of biologists published a 299-page technical report warning that a technology that does not yet exist could potentially end life as we know it. The technology is the "mirror cell"—a living cell built from molecules that are the mirror image of those found in all known life. The report’s authors, which include scientists who had been actively working toward this goal, argue that creating such a cell could unleash a catastrophe unlike anything seen before. The warning is unprecedented: a call to stop a line of research before it has even produced its first major result.
The problem with handedness
The core issue is a property called chirality, or handedness. Just as human hands are mirror images that cannot be superimposed on each other, many biological molecules come in two mirror-image forms. Life on Earth has made a universal choice: the building blocks of DNA and RNA are all "right-handed," while the amino acids that make up proteins are all "left-handed." This is not a chemical necessity—mirror molecules can be made in a lab—but it is a fundamental rule of biology as we know it.
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What you'll learn
- 1 (00:31) **Tech Camp Introduction** - Regina Barber introduces the summer series and teases a story about cells that elicits two very different reactions from scientists.
- 2 (01:10) **Chirality: The Handedness of Life** - Carl Zimmer explains that all life on Earth is "right-handed," a property called chirality, and that mirror-image molecules are possible.
- 3 (03:02) **The Allure and the Warning** - Carl describes the scientific appeal of mirror cells, but notes that a group of biologists has published a 299-page report warning they could cause a catastrophic pandemic.
- 4 (05:35) **The Pandemic Scenario** - Carl details the scientists' worst-case fear: a mirror cell escaping the lab, being invisible to immune systems, and causing an uncontrollable pandemic.
- 5 (07:09) **Threat to All Life** - The risk extends beyond humans to plants and agriculture, as all biological defense systems are "tuned to life on our side of the mirror."
- 6 (08:04) **The Hurdles to Creating a Mirror Cell** - Carl explains the current scientific landscape, noting that while mirror proteins and RNA have been made, a full cell is a long way off.
- 7 (09:49) **An Unprecedented Call for a Stop** - Carl explains why this preemptive warning is unique compared to historical cases like recombinant DNA and CRISPR.
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Show Notes
The rules of life are based on this chemistry.
In recent years, scientists have worked toward a kind of mirror version of life. Currently, the technology doesn't exist to make mirror life at the cellular level — and likely won't for at least a decade. Still, a group of scientists is concerned enough about the possibility that they've published a 299-page technical report calling for a stop to the science.
In this encore episode for our Tech Camp series, host Regina Barber talks to Carl Zimmer, a science reporter at The New York Times, about his reporting on mirror cells — and why creating them could lead to devastating consequences for life on Earth.
Check out Carl's full article.
Curious about other controversial research? Email us at [email protected].
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