Belief in God or other higher powers may be crucially linked to humans' cognitive ability to infer other peoples' mental states, called "theory of mind" or "mentalizing".

A new series on the best ways to help people with mental health problems around the world is launched in this week's PLoS Medicine.

In an "elaboration and explanation" of the REMARK (Reporting Recommendations for Tumor Marker Prognostic Studies) checklist, Doug Altman of the University of Oxford, UK and colleagues provide a detailed reference for authors on important issues to consider when designing, conducting, analyzing and reporting tumor marker prognostic studies.

Climate variability associated with El Niño was associated with higher mortality for eggs and hatchlings of the critically endangered leatherback turtle, an effect that could be worsened by continuing global climate change.

Octopuses camouflage themselves by matching their body pattern to selected features of nearby objects, rather than trying to match the entire larger field of view, according to new research published in the open access journal PLoS ONE.