Magnetic levitation: New material offers potential for unlocking gravity-free technology ( phys.org )
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https://www.science.org/doi/10.1126/science.adi7918
The genetic alphabet contains just four letters, referring to the four nucleotides, the biochemical building blocks that comprise all DNA. Scientists have long wondered whether it's possible to add more letters to this alphabet by creating brand-new nucleotides in the lab, but the utility of this innovation depends on whether or...