Tag: nature

Voyager 1 Fires Up Thrusters After 37 Years

If you tried to start a car that’s been sitting in a garage for decades, you might not expect the engine to respond. But a set of thrusters aboard the Voyager 1 spacecraft successfully fired up Wednesday after 37 years without use. NASA announces: Voyager 1, NASA’s farthest and fastest spacecraft, is the only human-made object in interstellar space, the environment between the stars. The spacecraft, which has been flying for 40 years, relies on small devices called thrusters to orient itself so it can communicate with Earth. These thrusters fire in tiny pulses, or “puffs, ” lasting mere milliseconds, to subtly rotate the spacecraft so that its antenna points at our planet. Now, the Voyager team is able to use a set of four backup thrusters, dormant since 1980. “With these thrusters that are still functional after 37 years without use, we will be able to extend the life of the Voyager 1 spacecraft by two to three years, ” said Suzanne Dodd, project manager for Voyager at NASA’s Jet Propulsion Laboratory, Pasadena, California. Read more of this story at Slashdot.

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Voyager 1 Fires Up Thrusters After 37 Years

We’re Not Living in a Computer Simulation, New Research Shows

A reader shares a report: A team of theoretical physicists from Oxford University in the UK has shown that life and reality cannot be merely simulations generated by a massive extraterrestrial computer. The finding — an unexpectedly definite one — arose from the discovery of a novel link between gravitational anomalies and computational complexity. In a paper published in the journal Science Advances, Zohar Ringel and Dmitry Kovrizhi show that constructing a computer simulation of a particular quantum phenomenon that occurs in metals is impossible — not just practically, but in principle. The pair initially set out to see whether it was possible to use a technique known as quantum Monte Carlo to study the quantum Hall effect — a phenomenon in physical systems that exhibit strong magnetic fields and very low temperatures, and manifests as an energy current that runs across the temperature gradient. The phenomenon indicates an anomaly in the underlying space-time geometry. They discovered that the complexity of the simulation increased exponentially with the number of particles being simulated. If the complexity grew linearly with the number of particles being simulated, then doubling the number of partices would mean doubling the computing power required. If, however, the complexity grows on an exponential scale — where the amount of computing power has to double every time a single particle is added — then the task quickly becomes impossible. Read more of this story at Slashdot.

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We’re Not Living in a Computer Simulation, New Research Shows

Bill Gates and Richard Branson Back Startup That Grows ‘Clean Meat’

A large global agricultural company has joined Bill Gates and Richard Branson to invest in a nascent technology to make meat from self-producing animal cells. “Memphis Meats, which produces beef, chicken and duck directly from animal cells without raising and slaughtering livestock or poultry, raised $17 million from investors including Cargill, Gates and billionaire Richard Branson, according to a statement Tuesday on the San Francisco-based startup’s website, ” reports Bloomberg. From the report: This is the latest move by an agricultural giant to respond to consumers, especially Millennials, who are rapidly leaving their mark on the U.S. food world. That’s happening through surging demand for organic products, increasing focus on food that’s considered sustainable and greater attention on animal treatment. Big poultry and livestock processors have started to take up alternatives to traditional meat. To date, Memphis Meats has raised $22 million, signaling a commitment to the “clean-meat movement, ” the company said. Read more of this story at Slashdot.

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Bill Gates and Richard Branson Back Startup That Grows ‘Clean Meat’

Engineers Discover How To Make Antennas For Wireless Communication 100x Smaller Than Their Current Size

Engineers have figured out how to make antennas for wireless communication 100 times smaller than their current size, an advance that could lead to tiny brain implants, micro-medical devices, or phones you can wear on your finger. Science Magazine reports: The new mini-antennas play off the difference between electromagnetic (EM) waves, such as light and radio waves, and acoustic waves, such as sound and inaudible vibrations. EM waves are fluctuations in an electromagnetic field, and they travel at light speed — an astounding 300, 000, 000 meters per second. Acoustic waves are the jiggling of matter, and they travel at the much slower speed of sound — in a solid, typically a few thousand meters per second. So, at any given frequency, an EM wave has a much longer wavelength than an acoustic wave. Antennas receive information by resonating with EM waves, which they convert into electrical voltage. For such resonance to occur, a traditional antenna’s length must roughly match the wavelength of the EM wave it receives, meaning that the antenna must be relatively big. However, like a guitar string, an antenna can also resonate with acoustic waves. The new antennas take advantage of this fact. They will pick up EM waves of a given frequency if its size matches the wavelength of the much shorter acoustic waves of the same frequency. That means that that for any given signal frequency, the antennas can be much smaller. The trick is, of course, to quickly turn the incoming EM waves into acoustic waves. The team created two kinds of acoustic antennas. One has a circular membrane, which works for frequencies in the gigahertz range, including those for WiFi. The other has a rectangular membrane, suitable for megahertz frequencies used for TV and radio. Each is less than a millimeter across, and both can be manufactured together on a single chip. When researchers tested one of the antennas in a specially insulated room, they found that compared to a conventional ring antenna of the same size, it sent and received 2.5 gigahertz signals about 100, 000 times more efficiently, they report in Nature Communications. Read more of this story at Slashdot.

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Engineers Discover How To Make Antennas For Wireless Communication 100x Smaller Than Their Current Size

Chipotle finds malware exposed credit card info across the US

Hackers stole credit card information from customers at Chipotle restaurants across the United States between March 24th and April 18th, the company announced today. Chipotle revealed in April that it had been the victim of an attack, and today it shared details about the type of information stolen from customers, which covered “cardholder name in addition to card number, expiration date, and internal verification code.” No other information was compromised, Chipotle said. The attack pulled data off the magnetic strips of credit cards used in physical Chipotle locations around the US. The company has not said how many customers were affected, though it offered a searchable list of locations that were actually hit in the attack, including the dates each restaurant was vulnerable. Some were compromised for about a week, and others for the full four weeks. If you swiped a credit card at a Chipotle in March or April, check out the list of affected restaurants right here . “Because of the nature of the incident and the type of data involved, we do not know how many unique payment cards may have been involved, ” Chipotle spokesperson Chris Arnold told Engadget. As Reuters notes, Chipotle is not offering credit monitoring services to compromised customers. The company said monitoring services don’t alert customers when a fraudulent charge is made in their name. “Chipotle takes this kind of issue very seriously, and we regret any inconvenience or concern it may have caused, ” Arnold told Engadget. “To help prevent a similar incident from recurring, we have resolved the issue and continue to work with cyber security firms to evaluate ways to enhance our security measures.” Source: Chipotle

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Chipotle finds malware exposed credit card info across the US

Bitcoin Price Hits Fresh Record High Above $2,200

An anonymous reader writes: Monday marks the seven-year anniversary of Bitcoin Pizza Day — the moment a programmer named Laszlo Hanyecz spent 10, 000 bitcoin on two Papa John’s pizzas. More important than the episode being widely recognized as the first transaction using the cryptocurrency is what it tells us about the bitcoin rally that saw it break through the $2, 100 mark on Monday. Bitcoin was trading as high as $2, 185.89 in the early hours of Monday morning, hitting a fresh record high, after first powering through the $2, 000 barrier over the weekend, according to CoinDesk data. Throughout the weekend, the value of cryptocurrency was looming around $2, 000. Read more of this story at Slashdot.

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Bitcoin Price Hits Fresh Record High Above $2,200

An Old Satellite Dish Found on Google Maps Is Becoming West Africa’s First Radio Telescope

Astronomy needs expensive things, and lots of them. You might remember that astronomers almost literally turned the Earth into a telescope just to see a black hole, by combining lots of existing radio telescope dishes. Read more…

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An Old Satellite Dish Found on Google Maps Is Becoming West Africa’s First Radio Telescope

An Old Satellite Dish Found on Google Maps Is Becoming West Africa’s First Radio Telescope

Astronomy needs expensive things, and lots of them. You might remember that astronomers almost literally turned the Earth into a telescope just to see a black hole, by combining lots of existing radio telescope dishes. Read more…

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An Old Satellite Dish Found on Google Maps Is Becoming West Africa’s First Radio Telescope

An Old Satellite Dish Found on Google Maps Is Becoming West Africa’s First Radio Telescope

Astronomy needs expensive things, and lots of them. You might remember that astronomers almost literally turned the Earth into a telescope just to see a black hole, by combining lots of existing radio telescope dishes. Read more…

Read more here:
An Old Satellite Dish Found on Google Maps Is Becoming West Africa’s First Radio Telescope

An Old Satellite Dish Found on Google Maps Is Becoming West Africa’s First Radio Telescope

Astronomy needs expensive things, and lots of them. You might remember that astronomers almost literally turned the Earth into a telescope just to see a black hole, by combining lots of existing radio telescope dishes. Read more…

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An Old Satellite Dish Found on Google Maps Is Becoming West Africa’s First Radio Telescope