NASA’s closest-ever Sun flybys reveal how solar wind works

https://www.engadget.com/2019/12/04/nasa-parker-solar-probe-results/

As promised, NASA has presented the first results from the Parker Solar Probe — and they’re already providing a treasure trove of insights regarding the Sun. Most notably, the solar wind doesn’t behave entirely like scientists expected. There are flips in the Sun’s magnetic field direction (nicknamed "switchbacks") that manifest in the solar wind inside Mercury’s orbit, but not further. Moreover, the sideways movement of the solar wind near the Sun was not only "much stronger" than expected, but straightened out sooner than predicted as well.

There were more mysteries. The probe spotted tiny energetic particle events that never reach Earth, as well as bursts with oddly high levels of heavy elements. Both may be more common than scientists first thought, NASA said. At the same time, the craft also answered questions — humanity now has the first direct evidence of dust thinning out roughly 7 million miles from the Sun as the intense heat transforms the dust into gas.

The discoveries are poised to change humanity’s understanding of stars in multiple ways, including the causes of solar wind, the Sun’s rate of slowdown (a clue to its lifespan) and the effects of particle events on space weather. And remember, there are closer flybys to come, including a sixth flyby in September 2020 that could observe a dust-free zone roughly 2 to 3 million miles from the Sun. You may well see more findings that force astrophysicists to rethink their cosmic models.

Source: NASA, Nature

via Engadget http://www.engadget.com

December 4, 2019 at 02:36PM

Radar reveals ghostly footprints at White Sands

https://arstechnica.com/?p=1627533

Radar reveals ghostly footprints at White Sands

Ground-penetrating radar could help archaeologists spot otherwise invisible ancient footprints, suggests a recent experiment at White Sands National Monument, New Mexico.

Tracks left behind in layers of hardened mud and sand at the site record where humans crossed paths with giant sloths and mammoths during the last Ice Age. But some of the tracks appear only when conditions are just right—usually after a rain—which makes them difficult to study. Archaeologist Thomas Urban of Cornell University and his colleagues used ground-penetrating radar to spot these so-called ghost tracks. The radar images also revealed layers of compressed sediment beneath mammoth tracks, which could reveal information about how the now-extinct woolly giants strode across the Pleistocene world.

Invisible ink

To test the method, Urban and his colleagues pulled a radar antenna across the pale gypsum sands of the former lake shore, pacing out a grid pattern over a site where, 12,000 years ago, a human and a mammoth crossed paths. Excavations at the site had already revealed “ghost prints” left by a person who walked north, and then back south, for about 800 meters (2,625 feet).

Sometime in the past, the prints filled with sediment and then got covered by a layer of fine gypsum sand, so they’re usually invisible from the surface. But the sediment filling the tracks holds more moisture than the sediment around them, so when there’s just the right amount of water present, the tracks stand out dark on the pale ground. They appear and vanish again like a message written in invisible ink.

Archaeologists already knew one location along the trackway had about 27 ghost prints. When Urban and his colleagues put their radar to the test, the images revealed 26 of the prints—and the images were detailed enough to calculate the length of the person’s stride and estimate their stature. It turns out that the sediment filling the tracks also reflects radar signal differently than the surrounding material, making it possible to detect otherwise invisible tracks.

Further north along the same trail of human footprints, Urban and his colleagues noticed a set of anomalies that looked like animal tracks. These were in a place where the playa’s surface looked blank and archaeologists hadn’t documented any tracks. After a rain, the anomalies turned out to be sloth tracks. Urban and his colleagues say their results suggest that the ground-penetrating radar could help archaeologists search for other ghost tracks. That could help researchers avoid having to wait for specific weather conditions to find tracks and could boost efforts to preserve the ancient stories written across the desert in invisible ink.

  • Ghost prints are a common phenomenon in playa landscapes like White Sands.

    Urban et al. 2019

  • Urban and his colleagues say they avoid visiting possible track sites in wet conditions, to avoid damaging them.

    Urban et al. 2019

  • In this close-up radar image, you can see a mammoth print, a human print, and a sloth print.

    Urban et al. 2019

  • These human and mammoth tracks have been excavated and date to around 12,000 years ago.

    Urban et al. 2019

Mammoth crossing

Shortly after the Ice Age pedestrian passed by on their way north, a mammoth lumbered west across the fresh tracks. Its massive forefoot distorted two of the human tracks as it passed. Sometime later, the same person crossed the mammoth’s path on the way south again, stepping right in the middle of a massive mammoth print. Beneath the mammoth tracks, radar revealed a complex 3D structure of compressed and deformed sediment; a record of the biomechanics of a long-extinct mammoth.

When an African elephant—the closest thing we now have to a mammoth—takes a step, most of its weight is on the front part of the foot at first. But as the elephant pushes off the ground with its toes, it shifts the pressure backward. And as the foot lifts of the ground, the pressure on the soil suddenly releases. Each of those phases pushes on the ground beneath in a different direction, and studying the patterns left behind can reveal a lot about the mechanical aspects of how an animal walked.

“It turns out that the sediment itself has a memory that records the effects of the animal’s weight and momentum in a really beautiful way,” said Urban in a recent press release. “It gives us a way to understand the biomechanics of extinct fauna in a way that we never had before.” Unlike the tracks themselves, these structures, called plantar pressure records, are hard to get at by excavating.

Ground-penetrating radar seems to be able to detect these plantar pressure records from mammoth tracks, which gives paleontologists a non-destructive way to access important information about how mammoths moved. “If you want to really study the detailed print morphology you still need to excavate it, but we are getting additional information which is rather exciting below the track which you would not get if you excavated,” co-author Matthew Bennett of Bournemouth University told Ars.

The next steps

If radar can reveal plantar pressure records beneath mammoth tracks, Urban and his colleagues suggest that under the right conditions, it might also shed some light on the gait of much older animals: dinosaurs.

“Our next task is to take the technique somewhere with a different type of sedimentary set up and try it. Namibia is one possibility (there are great tracks there which I have worked on in the past),” Bennett told Ars. “Then it is about trying it on a lithified dinosaur track and experimenting with the set up to see what we can see. There are few local sauropod tracks here on the Jurassic Coast in the UK which I have my eye on.”

Meanwhile, at White Sands, radar surveys and excavation have revealed previously unknown trackways crossing the ancient playa. “We have done further investigation and we do know more, but that will be part of a future paper,” Urban told Ars. “The work has been ongoing and will continue in 2020.”

Scientific Reports, 2019. DOI: s41598-019-52996-8 (About DOIs).

via Ars Technica https://arstechnica.com

December 4, 2019 at 10:57AM

Six Top Tech Companies Weaseled Their Way Out of $100 Billion in Taxes, Study Finds

https://gizmodo.com/six-top-tech-companies-weaseled-their-way-out-of-100-b-1840177693

Tech companies don’t pay their taxes. Together, Amazon, Facebook, Google, Netflix, Apple, and Microsoft may have skipped out on over $100 billion in taxes they should have paid since 2010, according to a new report from the UK-based tax accreditation organization Fair Tax Mark. That’s enough to pay three million Americans the median per capita annual income, 14 percent of US annual spending on K-12 education, 500,000 US homes, a nearly two-million-foot stack of one dollar bills, 56 million square feet of Manhattan real estate, 50 billion cans of beans, nearly 1 billion years of Netflix… fill in as applies to you.

Generally, about half of what they were ostensibly obligated to pay under corporate tax rates came out of our pockets in subsidies and tax breaks, not to mention the immense stockpiles of cash they’re hoarding in havens in Bermuda, Ireland, Luxembourg, and the Netherlands, to list a few of the locations cited by Fair Tax Mark.

“Their accounts actually note vast unrepatriated income abroad and that they are now bringing these historical sums back post Trump’s Tax Cuts and Jobs Act 2017 at much-reduced rates,” Fair Tax Mark Chief Executive Paul Monaghan tells Gizmodo. Monaghan says that the companies don’t share information about income, profit, and tax across various countries, which “they should most definitely be disclosing.”

Fair Tax Mark’s report points to Apple’s long habit of shuffling its money around the world and forking it over only when regulators reign them in. In 2017, Apple agreed to pay $14.6 billion in unpaid taxes in 2017 to Ireland and has since racked up another tab of $14.3 billion by the EU’s count, which it does not plan to pay. And Apple successfully avoided paying $50 billion in taxes on untaxed cash stored abroad, bringing it home for Trump’s sweet one-time charge of $38 billion.

Fair Tax Mark concentrates on “cash taxes paid,” the actual amount of taxes paid after deductions and refunds, versus tax provisions, the amount companies estimate paying in their public financial reports, including deferred taxes which may or may not be paid in future. Note that the corporate income tax rate was 35 percent before the Trump administration cut it to 21 percent in 2017.

Their findings:

  • Amazon paid $3.4 billion in income taxes over the past decade, which amounts to 12.7% of profit over that time.
  • Facebook paid 10.2 percent of its profits since 2010, “at a time when the federal headline rate of tax in the United States was 35 percent for seven of the eight years under examination.”
  • Google has claimed that its “overall global tax rate has been over 23% for the past 10 years, in line with the 23.7% average statutory rate across the member countries of the OECD.” Fair Tax Mark finds that it has actually given 15.8 percent of its profits in cash tax paid.
  • Netflix also paid 15.8 percent on its profits, albeit it operates on very thin profit margins.
  • Apple, which, they note, “presents itself as ‘the world’s largest taxpayer” makes good on its word with a total payment of $93.8 billion in income taxes this decade. But the percentage of profits is still a measly 17.1 percent.
  • Microsoft “has the least aggressive approach to tax avoidance of the Six,” they write, paying $46.9 billion in income taxes, though that represents 16.8 percent of its profit.

Google, for one, does not interpret tax responsibilities this way. A spokesperson tells Gizmodo that Fair Tax Mark “ignores the reality of today’s complicated international tax system, and distorts the facts documented in our regulatory filings.” They continue: “Like other multinational companies, we pay the vast majority – more than 80% – of our corporate income tax in our home country. As we have said before, we strongly support the OECD’s work to end the current uncertainty and develop new tax principles.” When pressed to further address the relevant claims in the report, Google declined to comment.

That statement skirts around Fair Tax Mark’s point of contention, which is with Google’s statement about paying 23 percent in global, not US, taxes. “Google’s statement bears out our contention that the majority of the tax gap is probably playing out outside of the US,” Monaghan tells Gizmodo. “In recent years [less than] 50% of Google’s reported profits are ‘foreign’, but obviously not their taxes paid!”

For argument’s sake, I’ll focus on Amazon, which famously paid zero dollars in federal income tax in the US in 2017 and 2018, mainly due to tax breaks. Some economists (and politicians) argue that these are essential for economic growth; others stress that this is totally legal. Bernie Sanders calls this absurd.

Amazon argued in a statement to Gizmodo that it’s unfair for Fair Tax Mark to lump them in with “technology companies” with higher profit margins, as though Amazon isn’t a tech company. “Amazon is primarily a retailer where profit margins are low,” a spokesperson wrote, “so comparisons to technology companies with operating profit margins of closer to 50% is not rational.” (By “where,” the spokesperson said Amazon is referring to the “wider retail environment,” not location.) Amazon very much is a tech company, and Monaghan would like to note that Amazon Web Services accounts for over half of their profits. (It also offloads much of the overhead cost that traditional retailers must endure to third-party sellers.) Plus, Monaghan writes, Amazon’s claim that its fellows operate with 50 percent profit margins is false: “the margins of the others over the decade are Google (27%), Apple (30%), Microsoft (31%), Netflix (4.5%), Facebook (44%).”

It’s true that Amazon’s profit margin is low; as Bloomberg explains, it keeps it that way by investing in new warehouses it can write off and paying employees in stocks, on which it can claim deductions. It also leverages a research and development credit and tax breaks on previous losses, at which point, Bloomberg writes, “its U.S. corporate tax liability can be whittled down to zero.” Those losses, Fair Tax Mark notes, add up to a $9.3 billion exchequer which Amazon can put toward future taxes.

The Amazon spokesperson also stated that “Amazon represents about 1% of global retail with larger competitors everywhere we operate, and had a 24% effective tax rate on profits from 2010-2018 – neither ‘dominant’ nor ‘untaxed’.”

Monaghan would put the effective tax rate at 21.4 percent, but “[l]et’s say Amazon is right,” he argues: that figure is still intentionally misleading because it applies to funds Amazon reports earmarking for taxes, not what it actually pays. “In terms of money actually paid over – the ‘cash taxes paid’ – the number is 12.7% over the last decade. They do not dispute this number, but rather are misdirecting people to a larger, vaguer and different figure.” Monaghan says that Fair Tax Mark sent all of its figures to the six companies, none of which were disputed.

That still doesn’t address the issue of what companies should have paid. Sure, $3 billion in city and state subsidies for Amazon’s proposed New York headquarters could have been the “astounding return on investment” Bill de Blasio anticipated. But they’re playing with our money, and so far, Google’s New York campus hasn’t seemed to do much to alleviate New York’s human rights emergency. People are sleeping on the pavement, rents keep rising, and it’s freezing out here. Jeff Bezos could chip in a few billion now and then, with a hundred to spare.

Gizmodo has reached out to Netflix, Facebook, Apple, and Microsoft and will update the post if we hear back.

via Gizmodo https://gizmodo.com

December 3, 2019 at 03:15PM

Firefox gets picture-in-picture video playback on Windows

https://www.engadget.com/2019/12/03/firefox-pip-video-windows/

One of the hardest things to do while multitasking is watching a video. Even if you open a clip in a new window, you often have to keep moving it around your screen so it’s not blocked by all the clutter on your screen. Mozilla‘s new Picture-in-Picture feature for Firefox pins just about any video to your screen and prevents other tabs or windows from obscuring it.

Once you’ve downloaded the most recent version of Firefox, hover over a video and a blue "Picture-in-Picture" option will pop up. Click the button and the video will open in a solitary player that you can move around as needed. The feature is only available on the Windows version of the browser, but it will hit Mac and Linux versions in January, according to Mozilla.

firefox picture in picture video playback

While having a second monitor would probably be the nicest way to keep one eye on a video and the other on work tasks, that’s not an option for everyone, and would be next to impossible for laptop users on the go. Picture-in-Picture mode could be a good fallback. Just make sure you’ve got a quick trigger finger for when your boss walks by.

Source: Mozilla

via Engadget http://www.engadget.com

December 3, 2019 at 09:00PM

Plex launches its free movie and TV streaming service

https://www.engadget.com/2019/12/04/plex-free-streaming-service-movies-tv-shows/

We’ve known for a while that Plex, a company best known for helping people organize their own media collection, is getting into streaming. In September, it announced that it had teamed up with Warner Bros. to deliver ad-supported content by the end of 2019, with the promise of more partnerships to come. That has now come to pass, as from today, thousands of "free movies, TV shows, extreme sports films, music documentaries, Bollywood musicals" have been unlocked inside the Plex app.

The ad-supported video-on-demand service is available in more than 200 countries to anyone with a free Plex account. There’s no paid subscriptions, and it features content from major studios including Metro Goldwyn Mayer (MGM), Lionsgate, Legendary and, of course, Warner Bros. American Ultra, Frequency, Lord of War, Rain Man, Raging Bull, The Terminator, Thelma & Louise and Apocalypse Now all feature, with more movies set to be added in the future.

If you’re already a Plex user, a new Free to Watch category will be unlocked under a Movies & TV on Plex sidebar item, allowing you to position it alongside your existing collections. Much like the Tidal and Web Shows items, the new streaming option can also be removed if it isn’t to your liking. If you’ve never used Plex before, it has apps on all major smart TVs and streaming boxes, meaning you can add it to your console, Roku, Apple TV, Amazon Fire TV and Android TV boxes, as well as iOS and Android devices.

Plex’s new offering doesn’t come with a price, but it does come with ads. Even if you’re a Plex Pass subscriber, which unlocks numerous features for streaming and managing a personal collection, these new movies and TV shows will still be punctuated by ads. Plex says it will serve "only about one-third the amount of ads you’d expect on cable television" and that while some movies and TV shows will be geo-restricted, the "vast majority" of content will be available worldwide.

Plex Free Movies

"Plex was born out of a passion for media and entertainment, and offering free ad-supported premium movies and TV shows is just the latest step in our mission to bring all your favorite content together in one place," said Keith Valory, Plex CEO. "What started more than a decade ago as a passion project to make accessing media on connected devices easier has evolved into the most comprehensive streaming platform in the industry, used by millions of people around the world."

Source: Plex Free TV

via Engadget http://www.engadget.com

December 4, 2019 at 08:06AM