一篇很好的科普文章，图文并茂： Health World Air Quality Index Brings Data to Life A recent study calculated that air pollution leads to 3.3 million premature deaths per year worldwide and this number may double by 2050. To put that in perspective, only heart disease (7.4 million) and stro ...
美国太空总署 ( NASA )的研究--50种 净化空气植物 _百度文库 实用 | 10种连 NASA 都认可“最能 净化 室内 空气 ”的 植物 Purifying Air Plants净化空气的植物 NASA Clean Air Study https://en.m.wikipedia.org/wiki/NASA_Clean_Air_Study#Chart_of_air-filteri ...
从物种多样性角度而言，地球上95%的生物你肉眼看不到。 From a diversity perspective, 95% of life on this planet is smaller than the eye can see, Laura Hug, an environmental microbiologist at the University of Waterloo in Canada says. And that collection of microorganisms just got a lo ...
Katie Mack写道： “Was Einstein wrong?” It’s a terrible question. We know general relativity can’t be the ultimate theory, because gravity and quantum mechanics do not play well together. The other forces of nature (electromagnetism and the nuclear forces) all fit quite well into ...
Lifestyle Five ways to travel through time 向过去旅行似无可能，但向未来旅行则有可能（Travel into the past is probably impossible. Even if it were possible, Hawking and others have argued that you could never travel back before the moment your time machine was built. But travel to ...
博文
视频
基金
相册
收藏
积分
会议