Solar Electricity Production Grows in Africa, with U.S. HelpIn many parts of Africa, communities have electricity ... [查看全文]
NASA Developing Food Bars for Mars FlightsWhen astronauts go to the planet Mars years from now, they will need ... [查看全文]
A Visit to the Virtual World参观虚拟世界Virtual reality, or VR, is a powerful, new technology.虚拟... [查看全文]
AIDS Vaccine Testing Taking Place in South Africa南非开展艾滋病疫苗临床试验Thursday is World AIDS Da... [查看全文]
Weather Predictions Expected to Improve with New U.S. Satellite美国新卫星有望改善天气预报A new Americ... [查看全文]
What do Spider Webs and Guitar Strings Have in Common?蜘蛛网和吉它弦的共同之处Spider webs have some... [查看全文]
Pulp from Plants Makes Packaging More Earth-FriendlyThe average American throws away about 84 kilos of plastic eve... [查看全文]
Juno Gets a Close-up Look at JupiterThe spacecraft Juno successfully passed close to Jupiter Saturday as it orbit... [查看全文]
A Laboratory Turns Deadly Insect Venom into Medicine一家实验室将致命昆虫毒液转化为药物To most of us,... [查看全文]
Ancient Earth Had More Oxygen than Scientists ThoughtResearchers say the Earth had much more oxygen nearly a bill... [查看全文]