Yaks and Cattle: Who Wins at the Top of the World?
Yaks thrive on the Qinghai‑Tibet Plateau, where oxygen is thin and food is scarce. Scientists wanted to know how the animals’ gut bacteria help them survive. They compared yaks and ordinary cattle at two heights: 2, 200 m and 3, 800 m. The rumen is the biggest stomach of a ruminant and houses mil