Bringing bacteria’s defense into focus

ITHACA, N.Y. – By taking a series of near-atomic resolution snapshots, Cornell University and Harvard Medical School scientists have observed step-by-step how bacteria defend against foreign invaders such as bacteriophage, a virus that infects bacteria. The process they observed uses CRISPR (clustered regularly interspaced short palindromic repeats) sites, where the cell’s DNA can be snipped […]

How the butterfly got its spots

ITHACA, N.Y. – By tweaking just one or two genes, Cornell University researchers have altered the patterns on a butterfly’s wings. It’s not just a new art form, but a major clue to understanding how the butterflies have evolved, and perhaps to how color patterns – and other patterns and shapes – have evolved in […]