This Week in Science

In Science this week, researchers from the University of New Mexico and Aarhus University present data showing that bird species with hemoglobin suited for high altitudes evolved this trait independently. The team analyzed genetic mutations in the hemoglobin of 28 species of birds that live in either high or low altitudes. They found that while the high-flying birds all had mutations resulting in hemoglobin with high affinity for oxygen, the molecular mechanisms underlying these mutations varied.

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The London School of Economics' Daniele Fanelli argues at the Proceedings of the National Academy of Sciences that the reproducibility crisis in science isn't as dire as some say.

A team of researchers in Portugal has examined the genomic basis for racing pigeons' athleticism and navigational skills, finding it's likely polygenic.

Wired reports that diagnostic firms continue to seek, post-Theranos, the ability to diagnose diseases from small amounts of blood.

In Science this week: analysis of DNA from ancient North Africans, and more.