Sketchers say making art together in urban environments allows them to create a record of a moment and to notice a little bit ...

The eyes—specifically, the outer area of the retina—may provide a window into early detection of Alzheimer's disease (AD) ...

In late winter, the zodiacal light is visible in the evening in the Northern Hemisphere (false dusk) and in the pre-dawn morning in the Southern Hemisphere (false dawn). In early autumn, the timing ...