Stud­ies show how once-ob­scure DNA cir­cles dri­ve can­cer, and maybe even how to stop them

Sci­en­tists have un­veiled a strat­e­gy for tar­get­ing a vul­ner­a­bil­i­ty in tiny cir­cles of float­ing DNA that can dri­ve ag­gres­sive can­cers.

These cir­cles — known as ex­tra­chro­mo­so­mal …

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