And Four

In Nature this week, Harvard Medical School researchers published a study showing that there may have been three migratory waves from Siberia to the Americas thousands of years ago, instead of one as was originally thought — a large one before 13,000 years ago, followed by two smaller ones.

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The Chan Zuckerberg Initiative is investing in Cold Spring Harbor Laboratory's BioRxiv.

A study appearing in PLOS One finds that shortened consent forms don't affect clinical trial participants' understanding of the study.

The National Security Agency monitored signal intelligence for signs of "nefarious" genetic engineering projects, Gizmodo reports.

In Nature this week: barley genome sequenced, method for genotyping and phasing short tandem repeats, and more.