The teeth held other surprises. The Krestovka mammoth belongs to a previously unknown branch of the mammoth family tree, an ancestor of the Columbian mammoth which roamed North America 1.5m years ago.

这些牙齿还包含着其他惊喜。克雷斯托夫卡猛犸象属于猛犸象家族的一个未知分支，该分支是150万年前生活在北美的哥伦比亚猛犸象的祖先。

A further argument against the simple wear and tear theory is the observation that the time within which organisms age lies between a few days (even a few hours for unicellular organisms) and several thousand years, as with mammoth trees.

反对简单磨损理论的另一个论点是观察到生物体老化的时间介于几天（对于单细胞生物甚至是几个小时）到几千年之间，就像猛犸象树一样。