1. Humans and some other animals like elephants and chimpanzees engage in rituals after death, such as vigils, carrying of bodies, and placing items with the deceased.
2. The earliest evidence of human burial dates back 50,000 years to Neanderthals, though the origins of burial rituals are unknown. Most human cultures engage in burial or cremation and ceremonies to memorialize the deceased.
3. Contemporary American burials typically involve expensive caskets and embalming, though "green burials" and cremation are growing in popularity due to concerns about the environmental impact and high costs of traditional burials.