A wearable device records the sounds of knees cracking, which could reveal clues about the condition of the joint. Christopher Intagliata reports.

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In an analysis of 14 presidential debate transcripts, two thirds of accusations of question-dodging had no merit. Christopher Intagliata reports.

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Remnants of a beer-making operation some 5,000 years old have been found in northern China.

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Evidence indicates that waves as tall as skyscrapers and thousands of kilometers wide once washed over the Red Planet.

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Many red-colored birds have to convert yellow pigments in their food into the red pigments that make their feathers and beaks so brilliant.

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Two different antibiotic-resistant E. coli strains have a protective relationship in which each disables a different antibiotic, allowing both to thrive. Christopher Intagliata reports.

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Scientists from numerous disciplines will brainstorm new strategies for measuring "Big G" in July.

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Dust clouds from the Sahara reach the Caribbean—and fertilize waters there when they arrive. Christopher Intagliata reports.

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Caltech theoretical physicist Sean M. Carroll talks about his new book The Big Picture: On the Origins of Life, Meaning, and the Universe Itself. (Dutton, 2016)

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A single-celled organism discovered in chinchilla droppings is the only known eukaryotic organism that lacks mitochondria-like organelles. Christopher Intagliata reports.

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