Our single-celled ancestors who lived more than 1.5 billion years ago were already impressively gene-rich and sophisticated, as per last week's blog.
生活在15亿年前的单细胞生物祖先就已经拥有丰富而复杂的基因，根据上周的博客。
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This idea is supported by research with mice, which has shown that providing a rich, stimulating environment directly affects gene expression in the brain.
这一观点已通过白鼠研究证实，实验证明提供一个丰富刺激的环境可直接影响大脑中的基因表现。
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Female wild-type mice on an ethanol-rich diet had 4 times as much alanine aminotransferase (ALT), indicating liver injury, than mice lacking the osteopontin gene.