How We Filter Out Background Sounds When Speaking

Summary: Researchers have traced how the brain filters out background noise during speech using signals between the motor and auditory cortices. These milliseconds-long electrical signals, called auditory corollary discharge, originate…

Turning Gray: Stuck Stem Cells Turn Hair Gray

Summary: A new study sheds light on why we tend to go gray as we age. Researchers found melanocyte stem cells get stuck as we grow older, losing the ability…