This Week in PNAS

In the early edition of the Proceedings of the National Academy of Sciences, a Massachusetts General Hospital- and Broad Institute-led team take a look at autism spectrum disorder symptoms and severity in relation to inherited and de novo risk variants in affected individuals. The researchers considered 2,000 ASD cases for the study, focusing on individuals with no affected siblings.

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NPR reports that Turkish high school students will no longer study evolution.

Researchers report they sequenced and identified plant species in an "al fresco" laboratory.

An Australian team searches for genetic alterations linked to depression in hopes of developing personalized treatments, the Sydney Morning Herald reports.

In PNAS this week: host contributors to typhoid fever risk, effects of obesity-related variants near TMEM18, and more.