Diseases, Conditions, Syndromes

Enhancing at-home COVID tests with glow-in-the dark materials

Researchers at the University of Houston are using glow-in-the-dark materials to enhance and improve rapid COVID-19 home tests. If you've taken an at-home COVID-19 or pregnancy test, then you've taken what is scientifically ...

Psychology & Psychiatry

Study shows negative emotions spark success, but there's a price

Tapping into the dark side and using anxiety and anger can spark more success than fun and relaxation—but at the cost of your health. The multi-national research led by The University of Essex has uncovered how the mind ...

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Darkness, in contrast with brightness, is a relative absence of visible light. It is the appearance of black in a color space. When light is not present, rod and cone cells within the eye are not stimulated. This lack of stimulation means photoreceptor cells are unable to distinguish color frequency and wavelength. The resulting perception is achromatic and in the case of darkness, black. The emotional reaction to darkness has metaphorical importance in many cultures.

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