PNAS in the News

Past analogs of projected future climates

A study suggests that as temperatures rise, future climates could be analogous to past climates from Earth’s deep history, and that unmitigated greenhouse gas emissions may result in the reversal of a 50-million-year cooling trend in two centuries.

Newsweek ●  CNN ●  PNAS Article

Primordial RNA and origins of life

A plausible primordial version of RNA could have served as an early genetic polymer, and the compound inosine could have substituted for the nucleobase guanine in an early version of RNA-based life, according to a study on the origins of life on Earth.

Boston Globe ●  Earth ●  PNAS Article

Transgenerational antidepressant effects in zebrafish

Administration of the antidepressant fluoxetine to zebrafish, a common laboratory model, reduced levels of the stress hormone cortisol as well as exploratory behavior, effects that persisted across generations, according to a study.

PBS ● CBC ●  PNAS Article

1
2
3

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.