2015年,我国科学家终于在瓮安生物群中找到了一枚6亿年前的贵州始杯海绵,虽然它只有米粒大小,却是目前毫无争议的原始动物中的老大。这一重大发现,将海绵在地球上出现的可能时间向前推进了6000万年,对研究多细胞动物的起源意义深远。在生物演化史上,多细胞动物的出现具有十分重要的意义,标志着生物进入了高级发展阶段,也意味着地球环境发生了重大变化。然而,原始多细胞动物究竟何时出现?最原始的 In 2015, our scientists finally found a Guizhou Cup sponge, 600 million years ago, in the Weng’an biota. Although only a grain of rice, it is the undisputed leader of the original animal. This major discovery has pushed the sponge’s possible time on Earth 60 billion years forward and is of far-reaching significance for studying the origin of multicellular animals. In the history of biological evolution, the appearance of multicellular animals is of great significance, marking the biological advanced stage of development, but also means that the earth’s environment has undergone major changes. However, when did primitive multicellular animals appear? The most primitive