This Week in PNAS

In a study appearing online this week in the Proceedings of the National Academy of Sciences, researchers from the US and Brazil demonstrate the feasibility of finding cell-free DNA in the cerebrospinal fluid that stems from tumors in the brain or spinal cord. The team started by using targeted sequencing and/or exome sequencing to find cancer-specific mutations in tumor samples from 35 individuals with primary gliomas or medulloblastomas.

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American scientists find themselves once again warning the Trump administration not to dismiss science, the New Yorker report.

A new study suggests CRISPR could be used to save coral reefs from dying off, Forbes reports.

Researchers have found that the i-motif shape of DNA previously observed in the lab also exists in human cells, and that it may serve a purpose.

In PNAS this week: a genomic, transcriptomic, and metabolomic analysis of the tea plant, Arabidopsis thaliana's adaptations to specific local environments, and more.