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News
Top hydrogen-storing polymer revealed Aug 24
A series of computer simulations has identified a polymer material with a very large capacity for storing hydrogen that could be exploited in fuel cells. Jisoon Ihm and colleagues at Seoul National University in South Korea have discovered that polyacetylene with titanium atoms attached to the polymer chain can hold 63 kilograms of hydrogen per cubic metre -- more than any other similar material in their survey.
Satellite protection plan could backfire Aug 24
An international team of researchers claims that a plan by the US military to shield hundreds of low Earth-orbit satellites from aerial nuclear explosions and powerful solar storms could also disrupt global communications and navigation systems for up to a week. They say that the proposed "radiation belt remediation" system would temporarily change the upper atmosphere from a mirror bouncing high frequency radio waves around the Earth to a sponge that absorbs them instead.
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