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Image copyright Chris Zollner Image caption Christian Zollner has been trying to find new uses for LEDs “The tech we are working on could transform water sanitisation techniques and offer access to clean drinking water to even remote developing regions via portable systems,” says Christian Zollner from the University of California in Santa Barbara. Mr […]

Image copyright Getty Images Police in England and Wales recorded more than 10,000 online grooming offences on social media in in just two-and-a-half years. Where the method was recorded, more than half – 55% – took place on a Facebook-owned app. The figures come from freedom of information requests lodged by child protection charity the […]

Isabella Ong, 24, is American-Chinese living in New York. Because of coronavirus restrictions she couldn’t visit her grandfather’s grave for her annual family tradition called Bai San. So she found a way to honour him in the popular game Animal Crossing. Video by Derek Cai and Joshua Ong.

Image copyright EPA France is set to launch its coronavirus contact-tracing app as soon as the weekend after it cleared two parliamentary votes. The country’s Senate approved its release by a vote of 187-to-127 on Wednesday evening, following an earlier 338-to-215 National Assembly vote. A bug bounty scheme will be run to encourage the public […]

Image copyright Retuers Image caption Mr Zhao is one of China’s most prominent spokesmen Twitter, under intense scrutiny for its use of fact-checking warnings, has added them to tweets from China’s foreign ministry spokesperson. The warning has been added to tweets from spokesman Lijian Zhao, in which he warned: “It might be US army who […]

Here’s what you need to know: ImageA testing site south of London this month.Credit…Andrew Testa for The New York Times As mass testing and contact tracing are rolled out in some nations, others are way ahead. The push for large-scale coronavirus testing and contact tracing has been at the core of the World Health Organization’s […]

Image copyright Getty Images Uber is destroying thousands of electric bikes and scooters, after selling its Jump business to Lime. Videos of its red bikes being crushed at a recycling centre were shared on social media, angering cycling advocates. Uber said it had decided to destroy thousands of its older-model vehicles due to maintenance, liability […]

Here’s what you need to know: Video transcript Back transcript SpaceX Astronaut Launch Postponed Because of Poor Weather Weather conditions did not clear up in time for the SpaceX mission planned for Wednesday. The next opportunity to launch is Saturday afternoon. “That is liquid oxygen you see venting off the rocket. That’s completely normal and […]

The first confirmed coronavirus infections in Europe and the United States, discovered in January, did not ignite the epidemics that followed, according to a close analysis of hundreds of viral genomes. Instead, the outbreaks plaguing much of the West began weeks later, the study concluded. The revised timeline may clarify nagging ambiguities about the arrival […]