A study by Liang Zhang, a neuroscientist at Shanghai Jiao Tong University, suggests that the high-altitude, cold-hardy relative of the cow, may be the key to a medical breakthrough in multiple sclerosis treatments. The study found that animals living on Tibet's high plateau, including yaks and antelopes, carry a genetic mutation called Restat that protects their brains from low-oxygen conditions without damaging their myelin sheath. The same gene could help humans repair damaged nerves by regrowing the protective coating, potentially opening a new door for MS treatment. If successful, this could also help treat other conditions involving nerve damage.