Culture and Discovery

Was there once water on Mars?

作者：21ST

HAVING been on Mars for the past two months, NASA’s Curiosity Mars rover (探测器) has made its first major scientific discovery – the now desert-like Mars surface once had fast-running water.

点击阅读全文

对本期电子报订户、有效期内的VIP教师会员和本学期高三尊享卡用户，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。