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Twitter helps reveal deadly toll plastic takes on sharks and rays

Scientists scanned scientific studies and social media and found more than 1,000 cases of the animals becoming tangled in plastic debris.

USA

Electric air taxis powered by hydrogen promise greater range for intercity commutes

The new vehicles could be in production in the United States by 2021, but would need FAA approval.

USA

Are we living in a simulated universe? Here's what scientists say.

"If we are living in a simulation, then the cosmos that we are observing is just a tiny piece of the totality of physical existence."

USA

High-tech thermal cameras could protect whales from deadly collisions with ships

About 1,200 ship strikes were reported between 2007 and 2016, but a new detection system may help to keep these mammals safe.

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Privacy-first browsers look to take the shine off Google's Chrome

Microsoft and Firefox are two of a number of companies and organizations looking to take a piece out of Google.

USA

Baked Alaska: Record-high temperatures expected during 'unusual' heat wave

Experts say the blast of heat is "the definition of unusual."

USA

Space telescope captures cosmic 'fireworks' in red, white and blue

New image shows twin bulbs of light explode out of a gargantuan star system called Eta Carinae.

USA

After years of big spending, tech's political machine turns to high gear

"I've never seen pushback in such a fashion before," Terry Schilling, executive director of the American Principles Project, told NBC News.

USA

Freak hailstorm that hit Mexican city has a surprising explanation

The storm dumped 3 feet of hail on Guadalajara and left locals and people around the world searching for an explanation.

USA

Interstellar visitor was no alien spaceship, scientists say

A new look at the first interstellar object known to have visited our solar system gives a thumbs-down to supernatural explanations.

USA

Tim Cook disputes 'absurd' reports about Jony Ive's departure from Apple

In a rare, scathing statement sent exclusively to NBC News, Cook took issue with a report published Sunday night by The Wall Street Journal that said Ive had grown frustrated with Cook's leadership and alleged lack of interest in the design production pro

USA

Antarctic sea ice is shrinking rapidly after decades of growth. Scientists aren't sure why.

Researchers have long struggled to explain the unusual behavior of ice floating in the ocean around the planet's southernmost continent.

USA

Despite China concessions, Trump encouraged to keep pressure on Huawei

Senators from both parties responded to Trump's move with either words of caution or outright dissension.

USA

Facebook to remove false posts about census

Sheryl Sandberg, the company's No. 2 executive, says an accurate count is so crucial that the social network will treat the Census like an election.

USA

As Facebook cracks down on hate speech, it's also re-evaluating another policy: Nipples

In early June, 125 people protested in the nude outside the New York City headquarters of Facebook and Instagram. It worked.

USA

Scientists are searching for a mirror universe. It could be sitting right in front of you.

If the "mirrorverse" exists, upcoming experiments involving subatomic particles could reveal it.

USA

A strange, wavy jet stream is blasting Europe with heat. Scientists say this could be the 'new normal.'

Global warming is crimping the ribbon of air that controls weather systems in the Northern Hemisphere, intensifying extreme weather around the world.

USA

Dozens of lakes discovered deep under colossal ice sheet

With the help of ice-penetrating radar, researchers pinpoint 56 previously unknown lakes.

USA

A vast water reservoir has been discovered deep beneath the Atlantic Ocean

If similar reservoirs exist in other coastal areas, they could be valuable resources for water-starved regions around the world.

USA

Jony Ive, the iconic designer behind Apple's iPhone, is leaving the company

Ive, who was a close confidant of the late Apple co-founder Steve Jobs, plans to step down this year to form a design company.