HIV Drugs Shown to Be Effective in Trials

SEATTLE—Findings from several clinical trials show how well drugs meant to treat the AIDS virus can protect people from becoming infected. But the trials also show that finding prevention methods that people will use is just as important as the medications themselves, researchers said Tuesday.

Researchers Study Awe and Find It Is Good for Relationships

Polett Villalta says her first deep scuba dive was one of the best experiences of her life. As she descended to 110 feet, a sunken ship slowly became visible in the green-grey water. A turtle swam by.

When Black Americans Lost Their Moses

An African-American woman, weeping by the White House gate after Abraham Lincoln’s death, cried: ‘We have lost our Moses.’

This Computer Keyboard Knows Who You Are

Researchers have developed a keyboard that identifies the typing patterns of computer users—and maybe can charge their smartphones, too

Chinese Dump Milk as Prices Fall

LINLI COUNTY, China—The Year of the Goat isn’t working out well for Pi Hui’s cows. The 53-year-old Chinese farmer has slaughtered 180 dairy cattle about 20% of his herd in recent months as a global glut of milk drove prices to six-year lows. Mr. Pi, who began in the industry as a 16-year-old milker, held out for months.

Find a Bug, Claim a Bounty

For four years, Jay Kaplan helped the National Security Agency find holes in targets’ computers so spies could take a peek. Now, he pays freelance hackers to find similar holes so his corporate customers can patch them.

Building a Robot for the Home

TOKYO—At a mobile phone store here, a white plastic robot on wheels sidles over to a visitor and tries to strike up a conversation. In a childlike voice, it proclaims that rain is on the way, oil prices are falling and the subway is on time.

Ten Billion Dollar Ideas You’ve Never Heard Of

Many members of Billion Dollar Startup Club are now well-known names, including car-hailing app Uber, messaging-service SnapChat and scrap-booking site Pinterest.

‘Piggybackers’ Hitch Themselves to Airbnb, Uber

Derivative startups, pegged to others’ success, are springing up faster than ever

Raspberry Pi 2 Review: A $35 Computer Can Do a Heck of a Lot

An open-source computer that encourages you to look inside

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