Why Does Gravity Travel at the Speed of Light?

The dead cores of two stars collided 130 million years ago in a galaxy somewhat far away.
The collision was so extreme that it caused a wrinkle in space-time — a gravitational wave. That gravitational wave and the light from the stellar explosion traveled together across the cosmos. They arrived at Earth simultaneously at 6:41 a.m. Eastern on August 17.
The event prompted worldwide headlines as the dawn of “multimessenger astronomy.” Astronomers had waited a generation for this moment.

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Elon Musk confirms Tesla is building its own chips for Autopilot

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Elon Musk in 2016.

PHILIPPE LOPEZ/AFP/Getty Images

Tesla is building its own custom AI chips, CEO Elon Musk acknowledged on Thursday night according to reports from CNBC and the Register.

“Jim is developing specialized AI hardware that we think will be the best in the world,” Musk said at a Tesla-organized party.

“Jim” is Jim Keller, a well-known chip engineer that Tesla recruited last year to lead Tesla’s Autopilot hardware efforts. Keller has held key positions at both AMD and Apple.

The stakes for Tesla are high. The first version of Tesla’s Autopilot were based on chips supplied by Mobileye, a leading supplier of autonomous car technology that is now owned by Intel. But the two companies had a bitter falling out last year, and Tesla built a new version of Autopilot without Mobileye’s help. This new version of Autopilot relied on chips from Nvidia.

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Why An Ivy League MBA Went Back To Ghana To Help A Pineapple Farm

Workers prepare pineapple seedlings for planting at the Gold Coast Fruits farm in Ghana.

Amy Yee for NPR


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Amy Yee for NPR

Workers prepare pineapple seedlings for planting at the Gold Coast Fruits farm in Ghana.

Amy Yee for NPR

Jerry Parkes stands in a vast field of spiky leaves and peers at a pineapple that is larger than usual. “Wow, look at the size of this fruit!” he exclaims.

A former London investment banker on a Ghanaian farm seems like a fish out of water. But for Parkes, leaving his finance career was part of a plan to return home and expand agriculture in Africa. Parkes co-founded Injaro, a private equity fund that invests in agricultural businesses in West Africa such as Gold Coast Fruits, this pineapple farm about 30 miles north of Accra.

Did Parkes, 43, know much about pineapples before Injaro invested in Gold Coast Fruits? “I knew how to eat one,” he jokes. He admits he needed a crash course in farming: “The closer you get to it, you realize how complex it is.”

Injaro’s goal is to boost agriculture in Africa, an overlooked and underfunded industry that is critical for the continent’s future. Although Africa has rich natural resources and strong agricultural potential, it imports $35 billion of food each year even as its fast-growing population demands more. “Agriculture remains the Achilles’ heel of Africa’s development success story,” according to the African Development Bank.

Parkes, chief executive of Injaro, is from Ghana while co-founder and chief operating officer Dadié Tayoraud is from Ivory Coast. The two started Injaro in 2009, a few years after they graduated from University of Pennsylvania’s Wharton business school. Parkes recalls Tayoraud introducing himself at their first meeting at Wharton’s African students’ club.

He remembers Tayoraud’s energy, enthusiasm and humor. “He wanted to start a movement where all African students move back to Africa after the MBA,” Parkes says. “For most of the rest of us, it was about succeeding, making it big in London or New York. After we succeeded, then we’d move back to Africa as a senior executive.”

After graduating from Wharton in 2006, Parkes, an electrical engineer by training, worked for UBS bank in London and as a fund manager investing in U.K. companies. Tayoraud worked in business development in Ivory Coast for Voodoo, a telecommunications company.

Parkes returned to Ghana with his wife and young children in 2009 to launch Injaro, in spite of “all the pressures to stay in the West where you can make a lot of money and not have to struggle,” he says.

He didn’t immediately announce his plans to his mother. Instead he arrived back in Ghana for the winter — and kept extending his stay while he started Injaro. “She’s a typical African mother who would think if you have a good job in London, there’s no reason to walk away and start something uncertain,” Parkes explains. “There would have been a lot of conversations second-guessing what I was doing.”

Ultimately, Parkes and Tayoraud wanted to grow businesses that would have a positive impact for as many people as possible. For them, the obvious choice was agriculture, which provides about 60 percent of all jobs in Africa.

Wharton grad Jerry Parkes (left) is the co-founder of Injaro, a private equity fund that is investing in agriculture in Ghana.

Amy Yee for NPR


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Amy Yee for NPR

But agriculture is a precarious industry that faces natural risks such as unpredictable weather, drought, pests and disease along with additional challenges like political instability and poor supply chains.

And there’s a lack of modern agricultural resources — high-yield seeds, fertilizer and agricultural techniques — and a lack of investment. Sub-Saharan Africa needs about $11 billion for agricultural investment, according to the U.N.’s Food and Agriculture Organization.

Yet investors are leery of doing business in the sector.

“Investing in agriculture is risky. Many people have been burned,” says Ben Valk, head of food and agriculture partnerships at Dutch bank Rabobank, which operates in ten countries in Africa. “The returns are not particularly good. You have to really know what you’re doing.”

“Agriculture won’t give the same returns as technology,” Parkes admits.

But he had a different perspective: “A traditional investor asks, ‘How do I make money?’ We think, ‘How do I solve a problem while making money?'”

Injaro raised an investment fund of $50 million from investors that include Soros Economic Development Fund; CDC, the private sector arm of U.K. aid agency DFID; AGRA, an agriculture non-governmental organization backed by the Rockefeller Foundation; and others.

The company has invested in a chicken producer in Ivory Coast; cashew, shea butter and poultry feed companies in Ghana; as well as Gold Coast Fruits, the pineapple company in Ghana.

Injaro helps investee companies establish good business practices such as professional accounting systems, better management, refinancing onerous loans and smoothing cash flow.

A notable success was Injaro’s investment, in 2013, in Nafaso, a high-yield seed company in Burkina Faso. Nafaso nearly tripled seed production between 2012 and 2015, and expanded sales to other countries. In February 2017, Injaro had its first “exit” when it profitably sold back its share of Nafaso to the company’s founders after meeting production and financial targets.

Gold Coast Fruits is not yet profitable but is one of the area’s largest employers, with about 200 workers.

Gold Coast’s Ghanaian founders started the pineapple farm in 2005. But it was no easy task to cultivate export-quality pineapples year-round for markets in Europe and the Middle East while avoiding plant diseases, waiting for rain (the farm, like most in Ghana, has no irrigation) and managing workers. And Gold Coast Fruits had taken big loans and didn’t have enough funds to invest in improving the farm. “It just takes one mistake and you’re stuck,” says Parkes.

Not to mention it takes 14 to 18 months to grow a single pineapple, each in a nest of crown-like leaves.

After Injaro invested in Gold Coast Fruits in 2016, it spent six months restructuring the company’s bank debts. “Now that money is not a big problem, there’s more time spent on making the farm better,” says Parkes. More cash allowed the company to bulk-buy fertilizer, invest in new equipment and technology, and tackle problems of soil erosion and plant rot.

At one section of the 1,200-acre farm, workers bend over rows of soil. Beneath a hazy, humid sky, they stab holes in the ground with machetes and quickly insert pineapple plant seedlings. Their arms move in a blur of mechanical precision.

Patrick Serebour, farm manager, has been with Gold Coast Fruits for a decade. With gradual improvements and guidance from Injaro, Gold Coast Fruits now produces up to 50 tons of pineapple per 2.4 acres per harvest compared to a maximum of 35 tons in the farm’s early years. The company now expects up to 70 tons in future harvests. The improved productivity “has been very fantastic,” says Serebour.

Right now, 20 tons of pineapples are picked, washed, inspected and packed for export each day.

Amy Yee has written for the New York Times, The Economist, NPR and other outlets. She is a former staff journalist for the Financial Times.

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Bionic Double Hand Turns One Human Hand Into Two Robot Ones

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This is a video demonstration of the bionic Double Hand developed by youbionic. They come in both left and right hand models and you can actually buy one for €1,800 (~$2,120). One hand is controlled by your index and middle fingers, and the other hand by your ring finger and pinky. Based on the video, they don’t really seem stronger or more practical than a single human hand, and the functionality seems pretty limited besides being able to buy two and pleasure four robots simultaneously, which, let’s not kid ourselves, is exactly what these were invented for.

Keep going for the video.

Thanks to n0nentity, who’s holding out for two strap-on bionic arms so he can be more like his hero Goro from Mortal Kombat.

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Marvel comics arrive in Hoopla’s public library app

Comic books are a brilliant medium, but keeping up with the latest releases can be expensive. If you live in the US, it’s worth checking out Hoopla; the service is supported by more than 1,500 public libraries, and offers free digital access to DC, Image and IDW titles. And starting today, another major publisher is joining the platform: Marvel. More than 250 collections and graphic novels will be available, including Black Panther: A Nation Under Our Feet book one — by author, journalist and comic book writer Ta-Nehisi Paul Coates — Civil War and X-Men: The Dark Pheonix Saga.

There’s a handy map here that shows all of the Hoopla-supported libraries in the US. As Variety explains, the libraries set their own lending limits, so you might be able to check out five or 10 at a time through the app. You won’t, of course, get every new Marvel release, but it’s a good place to start if you’re unsure which characters or series to follow. Hoopla says there should be plenty of familiar faces from the Marvel Cinematic Universe, including Spider-Man, Daredevil, The Runaways, The Avengers and the Guardians of the Galaxy. As Luke Cage would say: Sweet Christmas…

Via: Variety

Source: Hoopla (Press Release)

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15 Reasons Why Mark Hamill Is Our Favorite Person

1. Mark Hamill has only gotten better with age

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2. Don’t get us wrong, he’s been cool from the very beginning — here he is re-enacting the classic Star Wars poster with Harrison Ford and Carrie Fisher

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3. He’s made millions of fans happy

Watch him surprise the hell out of a Star Tours group in Disneyland

The Force is strong with @hamillhimself as he surprised guests on Star Tours @Disneyland. #TheLastJedi #StarWars

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4. He’s a staunch defender of the prequels (and Jake Lloyd)

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5. Some of his stories are unbelievably heartwarming

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6. That Joker voice of his is so unsettling and iconic that it even threw Daisy Ridley out of step

7. Mark never goes anywhere without his favorite jumper

He’s got a pretty good sense of humor about it, too

8. In fact, Mark has a pretty good sense of humor about most everything

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9. That includes interactions with fans…

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10. …and of course self-depricating jokes

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11. People think Sebastian Stan (aka the Winter Soldier) looks a heck of a lot like a young Mark Hamill, and they’re not wrong

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…which makes Sebastian’s message to his "father" all the more heartwarming

12. That’s not the only "son" Mark has adopted

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13. To be clear, he seems like a great dad to his actual kids, too

14. He’s gotten pretty good at his trolling game over the years

15. But the best part about Mark Hamill is how he’s truly touched people’s lives

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Hyundai, Kia, Genesis and Subaru clean up in IIHS 2018 safety ratings

Hyundai, its partner Kia and its Genesis division are the big winners in the latest vehicle safety ratings from the Insurance Institute for Highway Safety, accounting for six of the 15 models that earned the Top Safety Pick+ awards for 2018. Subaru was right behind with four, Mercedes-Benz had two, and Toyota, BMW and Ford each had one.

Another 47 vehicles earned the Top Safety Pick designation, where Toyota had 10 vehicle models, with Hyundai recognized for nine models. All but one of the seven vehicles in Subaru’s lineup, the BRZ, qualified for one of the awards.

IIHS strengthened the criteria for the Top Safety Pick+ award for 2018 to require headlights to earn a “good” rating — an “acceptable” rating was previously enough to notch the “plus” award — and good or acceptable passenger-side protection in the small overlap front crash, which replicates a crash involving just the front corner of a vehicle. It also required vehicles to have acceptable or good headlights for the first time to earn a Top Safety Pick award. Most of winners for both awards qualified on the basis of optional upgrades.

IIHS in October began evaluating the passenger side of vehicles in its small overlap front crash test after it said it became clear that automakers were neglecting that side of the vehicle as they focused on improving driver-side protections. IIHS first began conducting driver-side small overlap crashes in 2012. It began measuring both how well low and high beams illuminated the road and the amount of glare they produce for oncoming vehicles as part of its ratings in 2016.

The Top Safety Pick+ winners are listed below. The list doesn’t include any minivans, pickups or minicars, which don’t appear on either list of awardees.

Small cars

Midsize cars

Large luxury cars

Midsize SUVs

Midsize luxury SUV

The full list of Top Safety Pick winners is available here.

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