人类进化为什么不卵生？ (opens in new tab)

<div class="main-wrap content-wrap"> <div class="headline"> <div class="img-place-holder"></div> </div> <div class="content-inner"> <div class="question"> <h2 class="question-title"></h2> <div class="answer"> <div class="meta"> <img class="avatar" src=" referrerpolicy="no-referrer"> <span class="author">瞻云，</span><span class="bio">先让一部分知识有趣起来</span> <a href=" class="originUrl" hidden="">查看知乎原文</a> </div> <div class="content"> <p><strong>种了什么因，就收获什么果。</strong><strong>卵生的人类祖先都灭绝了。</...