Walmart launches two-hour delivery service for groceries, electronics, and more, Jay Peters

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Walmart is launching a new delivery service, called Express Delivery, that will get purchased items to a customers’ home in less than two hours, the company announced on Thursday. The new service could be helpful if you need to get items in a hurry while respecting shelter-in-place orders during the COVID-19 pandemic. You’ll be able to use Express Delivery for …

Our sun is a weirdly ‘quiet’ star — and that’s lucky for all of us, Meghan Bartels,

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Thank your lucky stars that the sun is pretty weird, as scientists have learned by comparing its activity with that of similar stars. In new research, astronomers compared the brightness of our sun over time with data gathered on other stars by NASA’s Kepler Space Telescope and by the European Space Agency’s Gaia star-mapping mission. The result is a census …

Pictures from space! Our image of the day, Space.com Staff,

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Space can be a wondrous place, and we’ve got the pictures to prove it! Take a look at our favorite pictures from space here, and if you’re wondering what happened today in space history don’t miss our On This Day in Space video show here! Venus meets the crescent moon (Image credit: Gianluca Masi/The Virtual Telescope Project) Monday, April 27, …

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The auto industry’s fight with the FCC over ‘vehicle-to-everything’ communication is heating up

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The auto industry is promising to dramatically expand “vehicle-to-everything” communication technology, but only if the Federal Communication Commission rolls back its decision to take away the current airwaves dedicated to that technology. Vehicle-to-everything (V2X) technology is expected to increase road safety by allowing vehicles to communicate with one another, as well as smart infrastructure like traffic signals, to better avoid …

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Bill Gates says countries will probably use interviews and databases to track the coronavirus

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Bill Gates thinks most countries will fight COVID-19 with interview-based contact tracing and a central database to track exposure. Gates posted a paper today outlining potential pandemic treatments, vaccines, and containment strategies. He calls contact tracing, which helps identify and isolate people who could spread the virus, an “ideal way” to stop the pandemic. But he downplayed the importance of …

Apps aren’t a reliable way to measure blood oxygen levels

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Doctors say one of the best ways to monitor patients with COVID-19 is by tracking their blood oxygen levels, which can show when they have dangerous breathing problems — even if they don’t feel short of breath. But along with toilet paper and digital thermometers, devices that measure those levels, called pulse oximeters, are hard to find. They’re either sold …