How to See the Northern Lights on Wednesday

A geomagnetic storm that made the aurora borealis visible farther south than normal is expected to continue for another night. But clouds may obscure your view.

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In China Truce on Tariffs and Rare Earths, National Security Controls Are Bargaining Chip

Some analysts say Beijing won a major victory in its trade talks: Getting the U.S. to withdraw a national security measure that previously was not under discussion.

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China’s Pause on Rare Earth Controls: What to Know

China has suspended export controls announced this month, but was conspicuously silent about rules imposed earlier, which are snarling global supply chains.

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Step by Step, How China Seized Control of Critical Minerals

China’s far-reaching rules already affect manufacturers of semiconductors, cars and many other products. They will soon become much broader.

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China’s Control of Rare Earths Has U.S. Scrambling to Find Alternatives

The Trump administration is trying an array of unconventional measures to shore up U.S. rare earths supplies. It remains uncertain whether the strategy will work.

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Cars to Fighter Jets: China’s New Export Curbs May Level a Heavy Blow Worldwide

Broad restrictions could cause supply interruptions for arms makers, as well as manufacturers in the semiconductor, automotive and other sectors.

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How China Is Weathering the Trade War With Trump

Tariffs triggered a plunge in China’s exports to the United States, but its global trade surplus is larger because sales to other regions are surging.

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Quakes on Mars Reveal New Features of the Planet’s Interior

Using data from NASA’s retired InSight lander, two separate teams of researchers found evidence of a sluggish Martian mantle and a solid inner core.

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Man Wearing Neck Chain Is Pulled Into M.R.I. Machine, Police Say

The man, 61, was in critical condition after entering an exam room in Westbury, N.Y., on Long Island, without authorization while a scan was in progress, the authorities said.

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China Puts New Restrictions on E.V. Battery Manufacturing Technology

Beijing will now require government licenses for any effort to transfer abroad the technologies crucial for producing inexpensive electric cars.

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