What are 'mirror cells' and why do some scientists warn against creating them?
Briefly

Scientists are exploring the concept of mirror life, where molecular structures mirror those found in earthly life. Currently, all DNA in living organisms has a right-handed twist, while protein building blocks are left-handed. While progress has been made in synthesizing mirror molecules in labs, the technology for developing mirror cells remains at least ten years from realization. Due to potential risks, a collective of scientists has raised alarms, leading them to publish a comprehensive 299-page report urging a halt to such research endeavors, reflecting the significant ethical implications involved.
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.
On a molecular level, earthly life takes this to the extreme. All of the DNA in living things twists to the right, whereas the protein building blocks favor a kind of left-handed chemistry.
In recent years, scientists have worked toward a kind of mirror version of life.
Read at www.npr.org
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