We have a tough trio of Pips puzzles today over at the NYT Games app. Even Easy is a bit harder than usual, and Medium is a definite head-scratcher. Today’s Hard Pips had me rearranging my dominoes ...

This story is part of Planet or Plastic?—our multiyear effort to raise awareness about the global plastic waste crisis. Learn what you can do to reduce your own single-use plastics, and take your ...

Christina Majaski writes and edits finance, credit cards, and travel content. She has 14+ years of experience with print and digital publications. Robert Kelly is managing director of XTS Energy LLC, ...

Solution-state nuclear magnetic resonance (NMR) spectroscopy is the classical NMR spectroscopy approach used for molecular structure determination, where the experimental sample is studied while in ...

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