Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional payments each time you use that ...

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These deformations correspond to three unique shapes: spherical, oblate (resembling a flattened sphere, like a tomato), and prolate (elongated, like a watermelon), coexisting near the nucleus’s ground ...

We present a general method for solving the modified Helmholtz equation without shape approximation for an arbitrary periodic charge distribution, whose solution is known as the Yukawa potential or ...

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For more audio journalism and storytelling, download New York Times Audio, a new iOS app available for news subscribers. transcript This transcript was created using speech recognition software ...

Donald Trump has tapped former Republican Representative Lee Zeldin to head the US's Environmental Protection Agency. Zeldin, a Trump loyalist, is expected to undo dozens of environmental ...