We are all “hard wired” to have limited ability to quickly and accurately communicate and work with each other. These limitations are especially acute in our urgent, stressful, and interruption-filled world. New views on these limitations include phenomena-like situational awareness and inattentional blindness. Development and testing of communication tools and interventions to improve communication and handoffs has undergone some research evaluation, but is mainly evidence-guided. Understanding human limitations in ability to communicate will help us create, test, and continually judge communication tools, especially automation and team training.