Scientists discover earliest bilaterian fossil of about 550 mln yrs old - Xinhua | En
 

Scientists discover earliest bilaterian fossil of about 550 mln yrs old - Xinhua | English.news.cn XinhuaNANJING, Sept. 5 (Xinhua) -- An international research team recently discovered a segmented bilaterian fossil about 550 million years old in China, which ...



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