This is Scientific American's 60 Second Science. I'm Steve Mirsky, got a minute? The Meridiana Planum region of Mars once had water that was really soft and highly acidic, conditions in incredibly hostile to any life forms that we know about. So any

发表于:2018-12-24 / 阅读(52) / 评论(0) 分类 Scientific American(二)月

The ground here is permafrost, a mixture of soil and ice frozen together. A group of Russian scientists have teamed up with NASA to drill down into it in search of microorganisms. It's work that's bee

发表于:2019-01-02 / 阅读(63) / 评论(0) 分类 火星生命

He wears gloves and cleans his tools with alcohol to avoid contaminating the ancient salt samples with modern microorganisms.

发表于:2019-01-02 / 阅读(120) / 评论(0) 分类 寻访外星人

New Antibiotic Found in Human Noses 研究人员在人类鼻子发现新抗生素 The search for new drugs to fight infections has led to a discovery in an unlikely place in peoples noses. What researchers found in noses is a compound called lugdunin

发表于:2019-01-12 / 阅读(37) / 评论(0) 分类 2016年VOA慢速英语(八)月

About 1500 years ago Chinese settled there, but the Dutch imperialist invaded there in the 17th century. After that, in 1662 Zheng Chenggong, a hero of nation,drove them out. Since 1683 the island was ruled by Qing Dynasty nearly two centuries. Unfor

发表于:2019-01-17 / 阅读(94) / 评论(0) 分类 英语作文

15.If during this period Lorraine and Mark, not neces- sarily in that order, are stationed at immediately adjacent windows, which of the following can be stationed at window 1 during this period? (A) J

发表于:2019-02-18 / 阅读(37) / 评论(0) 分类 实用英语