科学60秒:X光——透射生活的美好
X-rays are so common today you probably never stop to think about them. They help check a broken wrist, a sprained ankle, the state of our teeth. But a little more than a century ago, x-ray machi
The History of Chemistry
音乐的语言The Language of Music A painter hangs his or her finished pictures on a wall, and everyone can see it. A composer writes a work, but no one can hear it until it is performed. Professi...
告别寂静的春天
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 ...
生命的拼搏
短文Life Struggle Once upon a time in a land far far away, there was a wonderful old man who loved everything. Animals, spiders, insects... One day while walking through the woods the nice ol...