whether you believe in ghosts or not, you have to admit that stories of ghosts exist all around the globe The best explanation of why ghostsmostly appearat nightis perhaps because most people are scared of the dark since they can't see anything and imagine things to be there that arent. However, the a science-based theory too The earth's atmosphere is bombarded by sotar radiation from the sun more during the day than the night During this bombardment, atoms in the atmosphere tose their electrons and become ions that restrict some forms of electrical activity in the atmosphere Ghosts are believed to be energy based manifestations so its easier for them to manifest at night