The world's oldest DNA comes from a 2.4 million-year-old ecosystem in Greenland. Will scientists eventually sequence even older DNA?

A new study in fruit flies describes how an animal's gut reacts differently to beneficial microbes versus harmful pathogens.

CRISPR-Cas systems are adaptive immune systems found in prokaryotes that defend against invading nucleic acids through CRISPR RNA-guided cleavage. Type V CRISPR-Cas (Cas12) systems, in particular, ...