Here's the scene. The audience is waiting with bated breath, you're just about to give a speech, and suddenly you notice your mouth is dry as sawdust. Why?
Today's Moment of Science investigates the relationship between water deprivation and a body's feeding habits.
Chronic depression involves brain chemistry. Neurons in the brain communicate with each other via neurotransmitters, chemical messengers sent from one nerve cell to another. To move between cells a neurotransmitter must cross the synapse–the junction between neurons.