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Conditions on Mars were so harsh that it was hard to imagine any life surviving there. The idea of sophisticated aliens was wiped out. We know that conditions on Mars today are not very good for life.
This is Scientific Americans -60 seconds science .I'm Steve Murskey.Got the minute? People with high blood pressure are often told to watch the salt, and it's long been far that hypertension related to excess salt is caused by the salt increasing in
妈妈出差期间爸爸和丹尼尔的衣服只能自己洗,但偏偏在这个时候洗衣机坏了。幸好楼下有投币洗衣机,但好事多磨,他们又碰到什么问题了呢? Listen Read Learn Daniel: Dad, something wrong with our w
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SCIENCE REPORT-January 10, 2002: New Glaucoma Treatments By Nancy Steinbach This is the VOA Special English Science Report. Sixty-seven-million people around the world cannot see because they suffer f