Technology

Editor's Note: This story has been updated to reflect Strava's latest figures for the number of GPS-tracked activities uploaded to its database.

Cyclists often find themselves pedaling between huge trucks and speeding cars or stranded when protected bike lanes abruptly end at busy intersections.

Chris Cassidy moved to San Francisco in 2005. He used to cycle through Market Street, a busy downtown thoroughfare.

All over eastern Kentucky, you see cars and pickup trucks with black license plates proclaiming the owner is a "friend of coal."

Even though the license plates are all over, it's getting harder to find actual coal miners here: Fewer than 6,000 remain in the state, where the coal industry is shrinking fast. More than 10,000 coal workers have been laid off since 2008.

Many have had to leave the area to find work, but a few have found employment in other — and sometime unexpected — fields, as businesses are innovating to use former coal workers in new ways.

For several decades now, Georgia Tech professor Tom Conte has been studying how to improve computers: "How do we make them faster and more efficient next time around versus what we just made?"

Updated at 2:36 p.m. ET with an editor's note at the end of the story.

Sometimes you call an Uber, and what you thought would be an $8 ride is going to be two, three, even four times more — the result of greater demand brought on by a blizzard, or a baseball game. Whatever the reason, surge pricing is not fun.

It turns out Uber is working to fix it — or, should we say, end it. The move likely will be great for riders, but not for drivers.

Hunting For Surge

Intel was once known for its success in branding personal computers with microprocessors, a technology that fueled the digital revolution. But the Silicon Valley veteran announced last month it would lay off 11 percent of its workforce — up to 12,000 positions — and that it's shifting away from personal computing.

Elizabeth Holmes fit into the Silicon Valley success mold. A young Stanford dropout who left school to pursue her entrepreneurial vision, she founded Theranos and said she would disrupt the world of medicine with easy and inexpensive blood tests.

In his lab at George Mason University in Virginia, Sean Luke has all kinds of robots: big ones with wheels; medium ones that look like humans. And then he has a couple of dozen that look like small, metal boxes.

He and his team at the Autonomous Robotics Lab are training those little ones to work together without the help of a human.

In the future, Luke and his team hope those little robots can work like ants — in teams of hundreds, for example, to build houses, or help search for survivors after a disaster.

The extremely high-profile dispute between Apple and the FBI has ushered in a new phase in the debate over the future of secure communications. Though many Americans still struggle with the technical implications of encryption, it's now a household word.

The FBI has officially decided it can't tell Apple how the agency hacked into the locked iPhone used by one of the San Bernardino attackers.

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