PNAS in the News

Loss and recovery of mammal diversity

A study explores loss and recovery of mammal phylogenetic diversity (PD) during the current mass extinction, and finds that restoring all of the PD lost since the Last Interglacial would take 5–7 million years.

Discover Magazine ●  National Geographic ●  PNAS Article

Temperature rise and rainforest arthropod abundance

Researchers report that arthropods in the tropics of Puerto Rico have declined significantly since initial measurements in the 1970s, contributing to the collapse of the tropical rainforest’s food web.

Washington Post ●  Popular Science ●  PNAS Article

Depression and Facebook posts

Researchers report links between the prevalence of language indicating sadness, loneliness, hostility, self-reference, and rumination in Facebook users’ posts and subsequent diagnosis of depression in the users’ medical records.

US News ●  LA Times ●  PNAS Article

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Teaching Resources in PNAS

As a world-class multidisciplinary research journal, PNAS offers a wealth of content—from Core Concepts articles that explain a trending topic in a given field, to the ability to quickly download figures and tables for PowerPoint slides—that will enhance course curricula and encourage classroom discussion. These informative resources are collected here in the PNAS Teaching Resources Portal.