In a trio of studies, researchers follow up on a 40-year-old finding that certain bacteriophages replace adenine with so-called diaminopurine, perhaps to avoid host degradation.

A modeling study counters initial interpretations that the cluster began with someone who flew to Seattle in mid-January.

The inner ear cavity proves to be a useful tool for studying the evolutionary relationships among monkeys, apes, and humans.

Researchers analyzed more than 800 species.

Plants, fungi, and bacteria likely contributed to insect diversity.

The first phylogenomic tree of these insects shows their diversification occurred after they split into Old and New World groups.

The blue lagoons of the Cuatro Ciénegas Basin provide a glimpse into the planet’s ancient past.

In plants ranging from liverworts to wheat, parasitic water molds build intracellular structures analogous to the nutrient-exchanging structures of symbiotic fungi.

Researchers identify a new species of Hemimastigophora protist, and suggest the group should be promoted from a phylum to a supra-kingdom.