The act of prayer is attested in written sources as early as 5,000 years ago. According to World Population Review, about 85% of the world's people identify with a religion. The world's largest religion is Christianity, while Islam is the second most popular. Millions also follow Hinduism, Buddhism, Judaism, and other religions. Devotees worship in all sorts of ways, with a person's faith often the main source of their ethical and moral beliefs.
Intrigued? Click through and take a look at the different ways we pray.