Science & Technology

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The trip had mechanical setbacks, and the plane's average speed would be legal on many American streets. But when the Solar Impulse aircraft touched down in Abu Dhabi in the early morning darkness Tuesday, it successfully completed a round-the-world voyage using only solar power.

Swiss pilots Bertrand Piccard and André Borschberg took turns flying the single-seat aircraft that began its trip on March 9 of 2015, flying more than 26,700 miles in a total of 17 stages (23 days) as they soared under the sun's power and then glided through the night.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

The auto industry is watching to see whether Tesla, which has its roots in the tech world of Silicon Valley, can pull off its goal of mass producing cars.

The goal hit a road bump in May when Tesla had its first fatality in a vehicle using Autopilot, a feature it offers that allows the car to do a lot of the driving.

It's supposed to be an assist. Before you engage it, it warns you not to take your hands off the wheel.

The water supply for communities in the Canadian province of Saskatchewan is threatened by an oil spill that dumped an estimated 66,000 gallons of heavy oil, along with natural gas used to dilute it, into a major river.

The pipeline that broke is owned by Husky Energy Inc. The site of last Thursday's leak is within 1,000 feet of the North Saskatchewan River.

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