By studying the genomes of ancient Andean people, researchers have identified genetic adaptations that allowed them to thrive in high-altitude environments and adopt a farming lifestyle.

The Andes Mountains are one of the most extreme environments on Earth, with high altitudes, cold temperatures, and low oxygen levels. Despite these challenges, humans have lived in the Andes for thousands of years.

To understand how ancient Andean people were able to adapt to their environment, researchers from the University of California, Berkeley, and the Max Planck Institute for the Science of Human History sequenced the genomes of 28 individuals who lived in the Andes between 9,000 and 3,000 years ago.

The researchers found that ancient Andean people had a number of genetic adaptations that helped them survive in high-altitude environments, including:

* Increased levels of hemoglobin: Hemoglobin is a protein that carries oxygen in the blood. Ancient Andean people had higher levels of hemoglobin than other people, which allowed them to better transport oxygen to their tissues.

* Enhanced respiration: Ancient Andean people had larger lungs and hearts than other people, which allowed them to breathe more efficiently.

* Resistance to cold temperatures: Ancient Andean people had a genetic variant that helped them to produce more heat in cold temperatures.

In addition to these adaptations to high-altitude environments, ancient Andean people also had a number of genetic adaptations that allowed them to adopt a farming lifestyle, including:

* Increased starch digestion: Ancient Andean people had a genetic variant that helped them to digest starch more efficiently. This allowed them to obtain more nutrients from plants, which was important for a farming lifestyle.

* Lactose tolerance: Ancient Andean people had a genetic variant that allowed them to digest lactose, the sugar found in milk. This allowed them to consume dairy products, which was another important source of nutrients for a farming lifestyle.

The findings of this study provide new insights into the genetic adaptations that allowed ancient Andean people to thrive in their environment. These adaptations were essential for the development of human civilization in the Andes, and they continue to benefit Andean people today.