《科学》杂志属于综合性科学杂志，它的科学新闻报道、综述、分析、书评等部分，都是权威的科普资料，该杂志也适合一般读者阅读。“发展科学，服务社会”是AAAS也是《科学》杂志的宗旨。

 在全球，《科学》杂志的主要对手为英国伦敦的《自然》杂志，该杂志创办于1869年，曾发表了大量的达尔文、赫胥黎等大师的文章。21世纪的 前4年中，二者为率先发表人类基因排列的图谱而激烈竞争。

《科学》杂志的主编唐纳德·科尼迪毕业于哈佛大学，博士学位,为斯坦福大学第八任校长，着名的环境科学教授。

《科学》杂志官方网址：http://www.sciencemag.org

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Science is the academic journal of the American Association for the Advancement of Science and is considered one of the world's most prestigious scientific journals. The journal is peer-reviewed, is published weekly, and has a print subscriber base of around 130,000. Because institutional subscriptions and online access serve a larger audience, its estimated readership is one million people.

Cover
Heavy pollution blankets Tiananmen Square, Beijing, on 27 December 2007. Chinese authorities are taking drastic measures to improve the city's air quality for the Olympics. Bad air is just one of many environmental challenges China is facing.

China's Environmental Challenges

Three Gorges Dam: Into the Unknown
A marvel of engineering, the Three Gorges Dam will start operating at full capacity later this year. Already under way is an epic experiment on how a dam impacts the environment.

Fears Over Western Water Crisis
Dramatic reductions in water flow in the Tarim River, the lifeblood of Xinjiang Province, mean provincial authorities must act fast to conserve water and find alternative water sources.

A Green Fervor Sweeps the Qinghai-Tibetan Plateau
In a controversial venture, officials plan to halt open grazing, eradicate rodents, restore "degraded" grasslands, improve wetlands, and plant many trees and shrubs.

Beijing's Marathon Run to Clean Foul Air Nears Finish Line
Drastic measures have brought down levels of some pollutants; a return to business as usual after the Olympics could be bad for health.

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