Xcel Energy customers will be able to take advantage of a program with electricity rates that vary based on the time of the day. Customers will need to voluntarily opt in to that program, which offers ...

Here we examine a lesser-known example of perceptual constancy involving the auditory system, loudness constancy with varying sound source distance. Loudness is a perceptual attribute, and thus ...

U.S. lawmakers and officials voiced mixed reaction following a heated exchange between President Volodymyr Zelensky and U.S. President Donald Trump on Feb. 28, that culminated in the Ukrainian ...