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[科技新闻] 人类最古老祖先判明:五亿年前的皮卡虫
A two-inch-long, worm-like sea creature is the earliest-known animal to have the beginnings of a backbone.发现人类亲缘最古老的祖先——一种2英寸长类似蠕虫,聚集在海床上的生物。剑桥大学的科学家证实,一2012-04-17 编辑:Jasmine
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[VOA慢速-科技报道] VOA慢速新闻附字幕:人类祖先露西骨骼被发现40年
It has been more than 40 years since the discovery of the early human skeleton named Lucy. The old bones were found in Ethiopia. Lucy is one of the most famous finds of the 20th century.2015-02-15 编辑:Sunny