Bipedalism might feel natural to us, but in fact it's a specialized adaptation that is rather difficult compared to walking on all fours - no wonder most apes and monkeys avoid it. It also explains our prevalent lower back pain.

對我們來說一道本在线综合，我們可能感覺兩足動物很自然www.青草青，但是，事實(shí)上AV无码一级A片在线播放免费，兩足行走比四足行走難多了国产精品第5页狼友视频，所以，大多數(shù)猩猩和猴子避免兩足行走也不足為奇国产乱人乱伦视频，這還解釋了我們經(jīng)常腰疼的原因日本美女黄色免费一级视频。

This virus is known as S.I.V., simian immunodeficiency virus. Simians include apes and monkeys.

這個病毒被認(rèn)為是S.I.V。天天日天天爽天天要Av，猿類免疫缺陷病毒日日操天天干天天，猿類包括猩猩和猴子。

Kreht also investigated homologous areas in brains of a few apes and monkeys and found that the cortices of these animals had areas with similar cytoarchitecture as that found in Broca's area.

Kreht 也調(diào)查到在一些人猿與猴子的腦袋中有類似的區(qū)域且發(fā)現(xiàn)這些動物的皮層都有與Broca' area 相似的區(qū)域可以进的黄网站。