Martyn WilliamsSenior U.S. Correspondent, IDG News Service

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Martyn Williams covers Silicon Valley and general technology breaking news for the IDG News Service, and is based in San Francisco.

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Solar Impulse 2 is one flight away from circling the globe on no fuel

The Solar Impulse 2 aircraft landed in Cairo on Wednesday, putting it tantalizingly close to completing a circumnavigation of the globe without burning a single drop of fuel.

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Pokémon Go is making people take leave of their senses

Pokémon Go, the new augmented reality smartphone game, has players showing up in some strange places looking for virtual cartoon creatures. Now the U.S. National Safety Council is warning people not to play while driving.

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Honda's new motor for hybrid cars is a very big deal

Honda Motor has developed the world's first electric motor for hybrid cars that doesn't use heavy rare earth metals -- a major step forward in development of motors that are free from the political whims of the Chinese government.

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RoboBoat contest puts autonomous boats to the test

You've heard of self-driving cars and drones, but autonomous boats? This fast-developing industry has its eyes set on coastal surveillance, port security and other types of maritime operations, and some of the best in the industry were put against each other last week at the 2016 Roboboat contest.

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U.S. probes Tesla on autopilot system failures after fatal crash

The U.S. government has asked Tesla Motors for detailed information about key safety systems on its cars after a May 7 crash in which a driver was killed while traveling in autonomous mode.

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Amazon's Prime Day off to another rocky start

It could be another #primedayfail for Amazon. The online retailer has reported some customers are having problems adding items to their shopping carts and missing out on deals that have been heavily advertised on TV.

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Fearing surveillance, man allegedly shot at Google and set self-driving car ablaze

A man who told police he feared being watched by Google has been arrested and charged with arson after one of the company's self-driving cars was destroyed in an attack in June.

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FBI faults Clinton's personal email system, but doesn't recommend prosecution

Hillary Clinton was "extremely careless" in her use of a private email server while she was secretary of state, but the FBI isn't recommending any charges be brought against her for mishandling classified information.

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DARPA is looking to make huge strides in machine learning

The Defense Department's research and development arm wants to put computers to work in the complex task of creating models for machine learning.

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Boston Dynamics' latest robot is stymied by a banana skin

Boston Dynamics, the Google-owned robot maker that's apparently up for sale, has a new four-legged robot small enough to walk around a house, agile enough to load your dishwasher, and not quite clever enough to avoid banana skins on the floor.

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Amazon hit with two more fines over hazardous chemical shipments

The U.S. Federal Aviation Administration has proposed fining Amazon $130,000 for shipping or attempting to ship hazardous goods by air in 2014.

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Democrats' gun control sit-in moves to Periscope after TV feed is cut

Representatives took to Twitter and Periscope on Wednesday to evade a TV blackout of a sit-in held to push forward new gun legislation.

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New FAA rules mean you won't get Amazon drone delivery anytime soon

The Federal Aviation Administration has published long-awaited rules that loosen restrictions on commercial use of drones but don't go as far as allowing drone delivery services like that proposed by Amazon.

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Emojis: Now there's a movie coming

Emojis have become an important and essential communication tool for hundreds of millions of people, so naturally, now there's a movie coming.

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These ultra-thin solar cells can be bent around a pencil

Scientists in South Korea have developed solar cells thin enough they can be bent around a pencil. The cells, which were announced on Monday, could help usher in the use of solar energy in small portable gadgets where space is at a premium.