Mathematicians rely on numbers, but finding words to explain different levels of certainty has stymied everyone from the ...

By operating in the gray zone, states preserve escalation optionality, avoid reputation-locking commitments, and retain the ability to shift posture without incurring sudden political or strategic ...

2025 was the third hottest year on record, but thousands of cities saw record heat and one broke a record for cold. By Harry Stevens and Eric Niiler Last year was Earth’s third hottest globally, but ...

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A new poll shows Americans overwhelmingly do not want the U.S. to take "a more active role" in solving the world's problems.