Institute for Biochemistry and Biology, University of Potsdam, 14476 Potsdam, Germany.
Joseph Moore Museum, Earlham College, Richmond, IN 47374, USA.
Curr Biol. 2020 Feb 3;30(3):R110-R111. doi: 10.1016/j.cub.2019.12.041.
Xenikoudakis et al. report a partial mitochondrial genome of the extinct giant beaver Castoroides and estimate the origin of aquatic behavior in beavers to approximately 20 million years. This time estimate coincides with the extinction of terrestrial beavers and raises the question whether the two events had a common cause.
泽尼克乌达基斯等人报告了已灭绝的巨型海狸 Castoroides 的部分线粒体基因组，并估计海狸的水生行为起源于大约 2000 万年前。这个时间估计与陆生海狸的灭绝时间相吻合，这引发了一个问题，即这两个事件是否有共同的原因。
