translation.en: Like 99 percent of all the animals that have once lived, they go extinct, likely due to a warming climate and fast-encroaching dense forests that are migrating north, and also, as the late, great Paul Martin once put it, probably Pleistocene overkill, so the large game hunters that took them down.
translation.zh: 像99%曾经存活过的动物一样 他们灭绝很可能是由于气候的暖化 和在北迁过程中 迅速生长起来的森林 另外，正如已故的伟大保罗马丁曾经指出 很可能是“更新世时期”将他们赶尽杀绝 强大的猎人将他们都干掉了