单词:gamma-ray activity
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This is Scientific America's Sixty-Second-Science. I am Steve Mirsky. Got a minute? Some interesting electrical activity in the clouds of ash drifting around Europe as a result of that Icelandic volcano. Models predicted that electrical charge should
By David McAlary The U.S. space agency, NASA, launched a satellite Saturday that scientists hope will help them locate the sources of mysterious gamma ray explosions, the brightest most energetic burs
This is the VOA Special English Health Report. How active you are early in life may affect how able-minded you are late in life. That was the finding of a new study of cognitive impairment, or a loss in mental abilities. The study involved more than
BEIJING, March 29 (Xinhua) -- Chinese President Xi Jinping on Wednesday stressed the importance of afforestation and urged people, especially the young, to understand and protect nature via tree planting activities. Chinese PresidentXi Jinpingtalks w
A new study finds regular physical activity as a teenager may prevent cognitive impairment - a decline in mental abilities - decades later. Previous studies found that people who were physically active in later life were more likely to avoid mental d