To Know or Not?

Sophie Leggett watched her mother and her aunt struggle with early onset Alzheimer's disease, and although she has been tested to see whether she carries the presenilin 1 mutation linked to the disease in her family, Leggett doesn't want to know her results, writes Giulia Rhodes at the Guardian.

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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.