If you read the papers related to the work it's really not all that clear how much of this is genetic (inherited) evolution or just adaptation from birth to dif

If you read the papers related to the work it's really not all that clear how much of this is genetic (inherited) evolution or just adaptation from birth to different environmental conditions, i.e. any child born and raised at high altitude might display such adaptations, regardless of parentage. https://www.pnas.org/doi/10.1073/pnas.0701985104 https://www.pnas.org/doi/10.1073/pnas.0701985104 > "Tibetans (the study sample were Sherpas, an ethnic group that emigrated from Tibet to Nepal ≈500 years ago) who are born and raised at high altitude have higher capillary density in muscles as compared with Andean high-altitude natives, Tibetans born and raised at low altitude, or lowlanders." > "Are These Functional Adaptations Heritable? To evaluate the hypothesis that natural selection accounts for the functional physiological characteristics of Tibetan highlanders relative to Andean highlanders or of highlanders relative to lowlanders, a primary consideration is the presence of heritable variation in the traits under consideration. However, the genetic underpinnings of these quantitative traits are mostly unknown (with the exception of nitric oxide). These traits are also influenced by individual characteristics, including age and sex." > "With respect to identifying specific genetic loci contributing to high-altitude functional adaptation, efforts so far have not been successful." An accurate headline would replace 'are evolving' with 'might be evolving' for this work.