bacteria

Paradoxically, natural selection can sometimes seem to block organisms from evolving useful adaptations. But a new study of “fitness landscapes” and antibiotic resistance in bacteria shows that life still finds a way.

Why did mammals, grasses and some other groups of organisms explode in diversity only after millions of years? The evolutionary biologist Andreas Wagner plumbs the secrets of those “sleeping beauties.”

By watching “minimal” cells regain the fitness they lost, researchers are testing whether a genome can be too simple to evolve.

Should Covid-19 vaccines be judged by how well they prevent disease or how well they prevent death? Anna Durbin, a public health expert and vaccine researcher, talks with Steven Strogatz about the science behind vaccines.

The most comprehensive survey of how we share our microbiomes suggests a new way of thinking about the risks of developing some diseases that aren’t usually considered contagious.

Tiny genetic sequences in a mother’s bacteria seem to hop into the infant’s bacteria, perhaps ensuring a healthy microbiome later in life.

New research in fish suggests that gut microbes can have a crucial early influence on the brain’s social development.

Marine bacteria normally seen as single cells join together as a “microscopic snow globe” to consume bulky floating carbohydrates.

The discovery of a hot spot for horizontal gene transfer draws attention to the possible roles of parasites and ecology in such changes.