Culture includes knowledge, beliefs, arts, laws, morals, customs and habits that are shared and learned within a group. It is expressed through artifacts like objects, sociofacts like practices and behaviors, and mentifacts like values and attitudes. Culture is pervasive, learned, shared, adapted, and constantly changing. It influences explicit behaviors that are taught and implicit behaviors that are unconsciously acquired. A culture may view itself as ethnocentric while viewing others' cultures as different. However, all cultures address basic human questions about nature, activity, time, human nature, and social relationships.