Science

Britain reflects on quarantine for foreign visitors

[ad_1] LONDON: Britain could introduce a mandatory 14-day quarantine for international arrivals to stop the spread of the coronavirus, an airline association said on Saturday (May 9), raising the alarm in an industry that has already been hit by the global pandemic. Tim Alderslade, CEO of Airlines UK, the trade …

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Strange Bare Spots on Moon Reveal Possibly Active Lunar Tectonic System

[ad_1] Infrared (upper left) and other images from NASA’s Lunar Reconnaissance Orbiter revealed strange bare spots where the Moon’s ubiquitous dust is missing. The spots suggest an active tectonic process. Credit: NASA Strange spots scattered across the Moon’s nearside where bedrock is conspicuously exposed are evidence of seismic activity set …

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Fossil fuel-free jet propulsion with air plasmas

[ad_1] A schematic diagram of a prototype microwave air plasma thruster and the images of the bright plasma jet at different microwave powers. This device consists of a microwave power supply, an air compressor, a compressed microwave waveguide and a flame ignitor. Credit: Jau Tang and Jun Li Humans depend …

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