Physicists could do the ‘impossible’: Create and destroy magnetic fields from afar

Scientists have figured out a way to create and cancel magnetic fields from afar. 

The method involves running electric current through a special arrangement of wires to create a magnetic field that looks as if it came from another source. This illusion has real applications: Imagine a cancer drug that could be delivered directly to a tumor deep in the body by capsules made of magnetic nanoparticles. It’s not possible to stick a magnet in the tumor to guide the nanoparticles on their journey, but if you could create a magnetic field from outside the body that centered right on that tumor, you could deliver the drug without an invasive procedure. 

The strength of a magnetic field decreases with distance from the magnet, and a theorem proven in 1842, Earnshaw’s Theorem, says that it’s not possible to create a spot of maximum magnetic field strength in empty space.

“If you

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Tech icon criticizes San Francisco, announces move to Florida: ‘Impossible to stay here’

Bay Area tech icon Keith Rabois announced he’s leaving San Francisco permanently — and he is criticizing the city on his way out.

Rabois, an early executive at PayPal, Square, LinkedIn and more, told Fortune he is “moving imminently” because he’s finding it “impossible to stay” in San Francisco. After living in the Bay Area for 20 years, he said he plans on moving to Florida.

“I think San Francisco is just so massively improperly run and managed that it’s impossible to stay here,” Rabois told Fortune. He told the publication other friends in his peer group have done the same, and a look at his Twitter account shows multiple tweets about the so-called San Francisco exodus.

Rabois is a legend in Silicon Valley as an investor and a tech exec. He rose to prominence as part of the PayPal Mafia,

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Beyond the impossible: Lab-grown meat hopes to lure skeptics of plant-based options

This story is part of Tech for a Better World, stories about the diverse teams creating products, apps and services to improve our lives and society.

Winston Churchill foresaw the biggest food innovation of the 21st century back in 1931: “We shall escape the absurdity of growing a whole chicken in order to eat the breast or wing, by growing these parts separately under a suitable medium.”

Today that prospect nears, but is still so new it doesn’t have a widely agreed-upon name: cultured meat, clean meat, lab-grown meat, cultivated meat or, by its detractors, test tube meat. 

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All those terms denote meat grown from animal cells, rather than from a living, sentient animal. I’ll call it cultured meat, but regardless of name, it may start arriving at small scale in 2022 from companies such as Mosa Meat, Memphis Meats, Aleph Farms, and Meatable. It will be positioned as

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DHS Rule Aims To Make Qualifying For An H-1B Visa Impossible For Most

A new Department of Homeland Security (DHS) regulation narrows the definition of an H-1B “specialty occupation,” not to serve an important American national interest but to make it impossible for most foreign-born scientists and engineers to qualify for an H-1B visa. Companies say the new rule, published October 8, 2020, and now subject to litigation, is not connected to how individuals work in technology today, would force many current employees to leave America and will compel businesses to move more work out of the United States.

The new Department of Homeland Security (DHS) H-1B rule, which will go into effect in December unless blocked in court, would restrict what qualifies as a specialty

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