Now playing Next USA Tidal energy pioneers see vast potential in ocean currents' ebb and flow The world's leading marine energy center in Scotland is seeing breakthroughs in tidal power that could make the technology commonplace. 25/03/2019
Now playing Next USA Hackers could take over some wireless defibrillators, FDA says Patients should keep using more than 20 vulnerable Medtronic devices because the benefits outweigh the risks, the government says. 25/03/2019
Now playing Next USA Grindr turns 10: How a decade with GPS 'dating' apps changed us all What Uber did for cars, so Grindr did for hooking up. A decade after its release, NBC Out reflects on the impact Grindr has had on the gay and bi community. 24/03/2019
Now playing Next USA Northern lights may dip farther south than usual this weekend Light shows could be visible in Iowa, Colorado and Washington over the weekend. 22/03/2019
Now playing Next USA Can Steven Spielberg help sell iPhones? Apple is betting on it. When Tim Cook unveils Apple's new streaming service, the iPhone maker will join a growing field of companies that are vying for Hollywood's top talent. 22/03/2019
Now playing Next USA Devin Nunes faces an uphill battle in his lawsuit against Twitter Defamation and negligence cases can be won, but they're particularly challenging when a social media platform is involved. 22/03/2019
Now playing Next USA Feeding the future: How to change food production and diet to sustain the global population Experts will discuss ways to promote sustainable agricultural practices and dietary habits. 22/03/2019
Now playing Next USA How to watch NASA's first spacewalk of 2019 Two astronauts will work to upgrade the International Space Station's power system. 21/03/2019
Now playing Next USA New 'Aurora' supercomputer poised to be fastest in U.S. history The powerful device could help researchers model climate change or discover new cancer drugs. 21/03/2019
Now playing Next USA Facebook left 'hundreds of millions' of user passwords unencrypted Most companies encrypt passwords to prevent them from being stolen in the event of a data breach or used for nefarious purposes by company employees. 21/03/2019
Now playing Next USA Meteor no one saw coming exploded over Earth with force of 10 atomic bombs NASA says the blast was the second-largest meteor impact on record. 20/03/2019
Now playing Next USA Apple announces second generation of AirPods The new generation of AirPods marks Apple's latest expansion into the growing market of wearable technology, 20/03/2019
Now playing Next USA How to see the 'super worm equinox moon' The skywatching event coincides with the spring equinox, which heralds the start of a new season. 19/03/2019
Now playing Next USA Consumers see wellness apps as a way to meditate. Investors see profits. Meditation and sleep apps have raised hundreds of millions of dollars in venture capital, hinting at the start of a new lifestyle business. 19/03/2019
Now playing Next USA Facebook to launch new ad portal for housing, employment and credit ads The company will create a separate advertising portal for housing, employment and credit ads across Facebook, Instagram and Messenger. 19/03/2019
Now playing Next world news Final supermoon of the year will light up the sky this Wednesday The final supermoon of the year will light up the sky on March 20-21. It will occur only a few hours after the spring equinox. 19/03/2019
Now playing Next USA National Enquirer paid $200,000 to mistress' brother for Bezos' texts: Report "WSJ's report on old rumors from 'anonymous' sources is disappointing," Michael Sanchez told NBC News. 19/03/2019
Now playing Next USA Here's how AI could help catch shoplifters in the act The tech identifies suspicious activity based on shoppers' behavior, such as body language, gait and facial expressions. 19/03/2019
Now playing Next USA Nunes sues Twitter, users for defamation and negligence Suit filed in Virginia accuses company of "knowingly hosting and monetizing content that is clearly abusive, hateful and defamatory." 19/03/2019
Now playing Next USA Viral nature of New Zealand massacre puts online extremism in spotlight Do the big platforms have an obligation to remove white supremacist content? Or would that give them even more power over speech and thought? 19/03/2019