Stress environment, environmental stress. Sometimes it's quiet, when the machines pause. Your spirit drinks water from the air. Water is eternal, in reality. 

Starlings help calm your heart.

Living in fight-or-flight around the clock keeps cortisol flooding your system, which weakens your immune defenses, strains your heart and blood pressure, disrupts your gut microbiome, and — over enough time — physically reshapes your brain, shrinking the hippocampus (memory, emotion regulation) while the amygdala (threat detection) grows more reactive. (Brandi Morin)