Science: why do knee injuries often do not heal?


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After several years of living in the mountainous country of Switzerland, skiing in the winter and summer Hiking in the mountains, it’s amazing that my ligaments and cartilage in the knee joint is still intact. Although in order to damage the ligaments or the meniscus sloppy enough to turn on the office chair, or play football (there are precedents).

In the journal Science published an article that explains why a knee injury to heal, sometimes for the entire life of the patient. For details of isotope analysis of cartilage, welcome to under the cat.
Isotopic details

Translated by Yandex Translate