Steve Nadis

Stephen Hawking Was Wrong—Extremal Black Holes Are Possible

The original version of this story appeared in Quanta Magazine. To understand the universe, scientists look to its outliers. “You always want to know about the extreme cases—the special cases that lie at the edge,” said Carsten Gundlach, a mathematical physicist at the University of Southampton. Black holes are the …

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What Came Before the Big Bang?

The original version of this story appeared in Quanta Magazine. About 13.8 billion years ago, the entire cosmos consisted of a tiny, hot, dense ball of energy that suddenly exploded. That’s how everything began, according to the standard scientific story of the Big Bang, a theory that first took shape …

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How Game Theory Can Make AI More Reliable

The original version of this story appeared in Quanta Magazine. Imagine you had a friend who gave different answers to the same question, depending on how you asked it. “What’s the capital of Peru?” would get one answer, and “Is Lima the capital of Peru?” would get another. You’d probably …

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There’s a New Theory About Where Dark Matter Is Hiding

The original version of this story appeared in Quanta Magazine. When it comes to understanding the fabric of the universe, most of what scientists think exists is consigned to a dark, murky domain. Ordinary matter, the stuff we can see and touch, accounts for just 5 percent of the cosmos. …

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How to Guarantee the Safety of Autonomous Vehicles

The original version of this story appeared in Quanta Magazine. Driverless cars and planes are no longer the stuff of the future. In the city of San Francisco alone, two taxi companies have collectively logged 8 million miles of autonomous driving through August 2023. And more than 850,000 autonomous aerial …

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