Could Your Fitbit or Apple Watch Detect Early COVID-19 Symptoms?

Fitbit and other wearable devices typically linked to exercise are being studied as ways to identify people who are potentially infected with COVID-19 before symptoms appear, when they can unknowingly spread the disease.

Changes in heart rate, respiratory rate, and other biometrics measured constantly by the devices may flag the early stages of virus infection, so an otherwise healthy-looking person knows to self-isolate and seek a COVID-19 diagnostic test, researchers say.

“When you get ill, even before you know it, your body starts changing, your heart rate goes up,” said Professor Michael Snyder of Stanford University School of Medicine.

Stanford researchers are among several groups examining whether wearable fitness devices such as the Fitbit or Apple Watch can provide an early warning. Snyder’s team enrolled 5,000 people in the study and studied historical smartwatch data from 31 users who tested positive for COVID-19.

Of those 31, all of their data indicated infection before symptoms appeared. Wearable devices picked up the signals of infection early – before symptoms appeared – in an average of three days.

In one case, Snyder’s team found that a smartwatch was able to spot the first signal of potential COVID-19 infection nine days before more obvious

Richard Branson’s Virgin Orbit Reaches Space for the First Time With Its Air-Launched Rocket

Billionaire Richard Branson’s Virgin Orbit reached space for the first time on Sunday with a successful test of its air-launched rocket, delivering ten NASA satellites to orbit and achieving a key milestone after aborting the rocket’s first test launch last year.

The Long Beach, California-based company’s LauncherOne rocket was dropped mid-air from the underside of a modified Boeing 747 nicknamed Cosmic Girl some 35,000 feet over the Pacific at 11:39am PT (1:09am IST) before lighting its NewtonThree engine to boost itself out of Earth’s atmosphere, demonstrating its first successful trek to space.

“According to telemetry, LauncherOne has reached orbit!” the company announced on Twitter during the test mission, dubbed Launch Demo 2. “In both a literal and figurative sense, this is miles beyond how far we reached in our first Launch Demo.”

Roughly two hours after its Cosmic Girl carrier craft took off from the Mojave Air and Space Port in southern California, the rocket, a 70-foot launcher tailored for carrying small satellites to space, successfully placed 10 tiny satellites in orbit for NASA, the company said on Twitter.

The rocket, a 70-foot launcher tailored for carrying small satellites to space, aimed to place 10 tiny satellites in orbit

NASA’s Halted Rocket Test Could Stall Moon Shot, Redo Possible

NASA is considering a second firing of its Moon rocket engines after a critical test came up short over the weekend, a move that could bump the first flight in the Artemis lunar-landing programme into next year.

The space agency had aimed to launch its new Space Launch System, or SLS, rocket and an empty Orion capsule by the end of this year, with the capsule flying to the Moon and back as a prelude to crew missions. But that date could be in jeopardy following Saturday’s aborted test.

“We have a shot at flying it this year, but we need to get through this next step,” said Kathy Lueders, head of NASA’s human spaceflight office.

All four engines fired for barely a minute, rather than the intended eight minutes, on the test stand at NASA’s Stennis Space Center in Mississippi. The countdown rehearsal for the 212-foot (65-metre) core stage — made by Boeing — included the liquid hydrogen and oxygen tanks, as well as the all necessary computers and electronics.

On Tuesday, NASA attributed the automatic shutdown to the strict test limits meant to protect the core stage so it can be used on the first Artemis flight.

China’s Retrieved Lunar Samples From Chang’e-5 Probe Weigh Less Than Targeted

Lunar rocks retrieved by a historic Chinese mission to the Moon weighed less than initially targeted, but China is still willing to study the samples with foreign scientists, the mission’s spokesman said on Monday.

China became the third country ever to secure lunar samples when its unmanned Chang’e-5 probe, named after the mythical Moon goddess, brought back 1.731 kg (3.8 lb) of samples last month, falling short of the 2 kg (4.4 lb) planned.

The probe had estimated the lunar rocks to have a density of 1.6 grams per cubic millimetre, based on data from past missions by other countries, said Pei Zhaoyu, the mission spokesman.

Going by that figure, the probe stopped taking samples after just 12 hours, apparently assessing that the target had been reached.

“However, from tests, the actual density might not be that high,” Pei told reporters. “We originally planned to use 22 hours to complete the work of surface sampling, but, in fact, we stopped after 12 hours.”

But China is still open to cooperating with all nations in studying the samples, he said, including the United States.

For years, US laws have limited its space agency NASA from directly cooperating with China.

“We didn’t

NASA Test of Mega Moon Rocket Engines Cut Short Unexpectedly

NASA’s deep space exploration rocket built by Boeing briefly ignited all four engines of its behemoth core stage for the first time on Saturday, cutting short a crucial test to advance a years-delayed US government programme to return humans to the moon in the next few years.

Mounted in a test facility at NASA’s Stennis Space Center in Mississippi, the Space Launch System’s (SLS) 212-foot tall core stage roared to life at 4:27pm local time (3:57am IST) for just over a minute — well short of the roughly four minutes engineers needed to stay on track for the rocket’s first launch in November this year.

“Today was a good day,” NASA administrator Jim Bridenstine said at a press conference after the test, adding “we got lots of data that we’re going to be able to sort through” to determine if a do-over is needed and whether a November 2021 debut launch date is still possible.

The engine test, the last leg of NASA’s nearly year-long “Green Run” test campaign, was a vital step for the space agency and its top SLS contractor Boeing before a debut unmanned launch later this year under NASA’s Artemis programme, the Trump administration’s push to

Earth’s Atmosphere More Sensitive to CO2 Emissions Than Previously Believed, Study Finds

Hopes that the rise in average global temperatures by 2100 might be capped below 2.5-degree Celsius can be all but ruled out if greenhouse gas emissions continue at the current rate, new research reassessing the atmosphere’s sensitivity to carbon dioxide(CO2) suggests.

The study, under the Geneva-based World Climate Research Program, offers the first clear progress in decades toward narrowing the range of temperature rise caused by doubling of carbon dioxide levels since pre-industrial times.

Its findings show that doubling would trigger 2.6 to 4.1 degrees Celsius in average warming above pre-industrial levels, putting the lowest rise more than one degree above scientists’ previous estimated range of 1.5-4.5-degree Celsius.

“To put that in perspective, we’re on track to double CO2 at our current rate of emissions by around 2080,” said co-author Zeke Hausfather, a climate scientist at the Breakthrough Institute research center in Oakland, Calif.

Climate change is about as bad as we thought it was.”

The scientific consensus that the goal of capping the rise in average global temperatures at 1.5-degree Celsius, as enshrined in the 2015 Paris climate accords, is almost certainly out of reach unless greenhouse gas emissions rates fall.

Known as the climate sensitivity parameter, a

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