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'Bot' accounts were directed mostly towards content aligned with the Republican Party.

Letter to the Editor ...

The month's most spectacular science images. Plus, the surprising activity in the unconscious brain.

It's hard to swallow.

Andrew Robinson reviews five of the best science picks.

Genome-wide selective sweeps commonly occur in the human gut microbiome and can spread across the world within decades to produce epidemic-like population structures.

An analysis of climate models reveals the roles of internal variability and forced-circulation-induced precipitation trends.

Letter to the Editor ...

Thousands of dark proteins have been reclassified as peptideins and added to databases as a new category.

In the hippocampus, complex processing of sensory stimuli occurs even in the unconscious state.