Technology

Send virus alerts within 24 hours or risk second wave, scientist warns
People at risk of COVID-19 infection need to be alerted within 24 hours or contact tracing will be useless, a scientist advising the government has warned.
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'Jurassic Park was wrong': Raptors hunted alone and not in packs
Scientists have challenged a key plot point of the 1993 blockbuster Jurassic Park with new research suggesting raptors hunted alone rather than in packs.
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Cityscapes as youve never seen them - with light pollution removed
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Musk's SpaceX to make satellites 'invisible' after light pollution complaints
SpaceX plans to make its satellites "generally invisible to the naked eye within a week of launch" following complaints about light pollution.
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Temperature reading glasses tested in China
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Astronomers discover closest black hole to Earth
The closest black hole to Earth has been discovered about 1,000 light-years away, scientists have said.
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