科學(xué)60秒:和藻類共生的蠑螈

A rolling stone gathers no____1____. But a salamander embryo can attract algae. Inside its tissues and cells. This intimate________—the first ever seen between algae and a vertebrate—is reveale...

科學(xué)60秒:歐洲祖先原來很晚才學(xué)會生火的

Imagine life without fire. A lot of huddling for warmth. The ___1___ was that humans could make and control fire when they first migrated north to colder Europe, about a million years ago. But n...

告別寂靜的春天

故事Rachel Carson was a scientist and a bird watcher. She noticed, in the late '50s, the gradual disappearance of some birds, and linked it to our use of 1)pesticides. She wrote a book about her ...

可以治病的大米(2)

能不能邊吃飯，一邊就把病治了？可能嗎？People would take the vaccine as a drug that contains the powder. Cholera is usually spread through water or food, in places where conditions are dirty and d...