Extra Credit

Food powers big brains

作者：21st

Here’s something for raw-food lovers to chew on: cooked food might be a big reason why humans were able to grow such large brains compared to their body size, scientists say. 

点击阅读全文

对本期电子报订户、有效期内的VIP教师会员和本学期二十一世纪英文报尊享卡用户，我们开放所有内容：
如果您拥有以上权限，请点这里登录；
订阅电子报，请点这里；
激活VIP教师卡，请点这里；
激活21英语尊享卡，请点这里。