Indian Workers in U.S. Fear Trump H-1B Visa Crackdown

NEW DELHI—Santosh Pillai was wooed to work in the U.S. for his coding skills more than a decade ago and has built a good life in Cupertino, Calif. He considers it home and is awaiting approval for his green card—but is now worried his family could be forced to leave.

Snap IPO Tests Unsocial Network

Mark Zuckerberg says he created Facebook Inc. to make the world more open and connected. Twitter Inc.says it wants to give everyone the power to share ideas instantly.

Virtual-Reality Goggles Come With a Hitch: Real Reality

Philip Witten’s first trip to the virtual world came at a high price. The 21-year-old found himself fighting for his avatar’s life, immersed in a game on a friend’s virtual-reality device, in which he had to throw punches at oncoming attackers.

Artificial Intelligence Shows Its Hand

PITTSBURGH—Dong Kim is one of the best poker players in the world, but he has never played against an opponent quite like the one he just faced here.

How Immigration Uncertainty Threatens America’s Tech Dominance

Even before last Friday's executive order on immigration, lawyers told Tim Wilson not to bother hiring a Vietnamese national—an expert in “nanoscale structured material”—for a Silicon Valley startup.

How Uber and Airbnb Won

[J]eff Bezos never gave Brad Stone an interview for his best-selling biography of Amazon, “The Everything Store” (2013). But for “The Upstarts,” Mr. Stone has talked with all the key players at Airbnb and Uber to produce a fun, briskly told narrative that, unfortunately, labors under some burdens. Amazon launched in 1995—when some were still asking, what’s the internet?—and so Mr.

Did God Die in 1859?

Did Charles Darwin kill God?

Technology Radically Reshapes Leadership

As more companies seek to drive growth by adopting a new generation of mobile, cloud and data technology that is emerging in Silicon Valley, many are confronting an age-old issue.

Uber’s Drive Into India Relies on Raw Recruits

NEW DELHI—How do you train a million new Uber drivers in a country where most people have never driven a car, tapped on a smartphone or even used an online map?

Putty to Wear: Scientists 'Silly' Idea

Mixing graphene—a material made of single-atom-thick layers of carbon—with homemade “Silly Putty” produces a sensor so sensitive that it can detect the tiny footsteps of spiders, according to new research.

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