America has long had an unsettled relationship with milk. Another upheaval is underway. In politics and in culture, milk is suddenly inescapable.Credit...Shawn Michael Jones for The New York Times ...

Sensory deprivation tank therapy (SDTT) is an alternative therapy thought to have physical and mental health benefits, including stress and anxiety relief, reduction of blood pressure, and alleviation ...

Liquid crystals are substances that flow like a liquid but maintain some of the ordered structure of crystals. Liquid-crystal molecules tend to be elongated and to orient in specific directions ...

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