Before a cell divides, its DNA is replicated so that each daughter cell inherits the same genetic information. The two copies, known as "sister chromatids," are held together by a ring-shaped protein complex called cohesin until they are pulled to opposite poles of the cell in a miniature game of tug of war.

In a TV interview, Kash Patel, the director of the F.B.I., said investigators had found physical evidence connecting the suspected gunman with the fatal shooting of Charlie Kirk in Utah.

The giant DNA loops were discovered through a careful study of saliva samples from 56 volunteers, with further tests conducted on 476 samples to determine the prevalence of Inocles in the general population. Around three-quarters of us could be carrying the elements, the data shows.

Bacteria have long been a key source of lifesaving antibiotics, but most species cannot be grown in the lab—leaving their therapeutic potential untapped even as multidrug resistance becomes an increasingly urgent threat.

Tyler Robinson faces aggravated murder and firearm charges today in Utah County court, officials confirm. Follow Newsweek's live blog.