DNA sequencing technology has been improving by leaps and bounds in recent years, with several techniques vying for supremacy. Now an upstart technology, called nanopore sequencing, looks ready to jump to the front of the pack. Researchers have demonstrated for the first time that they can continuously read the chemical letters of DNA as it travels through a tiny pore, paving the way for a new kind of sequencing machine that decodes DNA much like an announcer reading a ticker tape. The advance...