There are up to a dozen possible routes, and the direct one versus the scenic one versus the loop-de-loop versus the dead end changes from person to person.

FORBES: So Reachable, We're Unreachable: The In-Box Perplex and the Content Marketer

Dr Stojanovic makes a DNAzyme into a logic gate by attaching a loop of DNA at one end that prevents the DNAzyme from working.

ECONOMIST: DNA computing