What are the most common reasons people think they see ghosts, especially during emotional times like funerals?

How can hospitals create environments that reduce feelings of loneliness for patients undergoing long-term treatments?
People have been drinking raw milk for thousands of years. Why is it considered unhealthy today?
Can a society stay moral if it values economic growth more than preserving its past?
Why do enlightened people prioritize the desires of others and avoid causing harm? What's their perspective on unity with all beings?
Are people today as resilient as they were when you were starting your family?